Showing papers by "Xinliang Zhang published in 2013"
TL;DR: Several schemes for broadband optical frequency comb (OFC) generation based on several nonlinear effects in highly nonlinear fiber (HNLF) are compared and all the OFC generation schemes have the advantages of tunability of central wavelength and repetition frequency.
Abstract: We compare several schemes for broadband optical frequency comb (OFC) generation based on several nonlinear effects in highly nonlinear fiber (HNLF). Cascaded four wave mixing (CFWM) and self-phase modulation (SPM) processes in HNLF are proved to be effective ways for spectrum broadening. We investigate some parameters affecting the performance of the output OFC in detail. When only CFWM occurs in the HNLF, broadband OFC can be generated with poor power flatness. When only SPM occurs in the HNLF, we obtain a 10 GHz OFC of 103 comb lines within 5-dB power deviation. When both CFWM and SPM simultaneously occur in the HNLF, we obtain a 10 GHz OFC of 143 comb lines within 4.5-dB power deviation. All the OFC generation schemes have the advantages of tunability of central wavelength and repetition frequency.
79 citations
TL;DR: In this paper, a notch microwave photonic filter (MPF) using two integrated microring resonators (MRRs) on a single silicon-on-insulator (SOI) chip is proposed and experimentally demonstrated.
Abstract: We propose and experimentally demonstrate a compact notch microwave photonic filter (MPF) using two integrated microring resonators (MRRs) on a single silicon-on-insulator (SOI) chip. The free spectral ranges (FSRs) of two cascaded MRRs are 160 GHz and 165 GHz, respectively. Due to the vernier effect, the transmission spectrum of cascaded MRRs is a series of bimodal distribution whose interval is an arithmetic sequence. By locating the laser wavelength at the middle of different bimodal intervals and fine tuning it properly, both central frequency and bandwidth of the notch MPF can be tunable. In the experiment, the tunability of central frequency and 3-dB bandwidth are demonstrated from 2.5 GHz to 17.5 GHz and from 6 GHz to 9.5 GHz, respectively. The best rejection ratio of the notch filter is larger than 40 dB. This approach will allow the implementation of low-cost, very compact, and integrated notch MPFs in a silicon chip.
64 citations
TL;DR: A high-order photonic differentiator is proposed and experimentally demonstrated using on-chip complementary metal oxide semiconductor-compatible cascaded microring resonators, including first-, second-, and third-order differentiators.
Abstract: We propose and experimentally demonstrate a high-order photonic differentiator using on-chip complementary metal oxide semiconductor-compatible cascaded microring resonators, including first-, second-, and third-order differentiators. All the microring resonator units have a radius of 150 μm and a free spectral range of 80 GHz. The microring resonator can implement the first-order derivative of the optical field near its critical coupling region. Hence higher-order differentiation can be obtained by cascading more microring units on a single chip. For the periodical Gaussian optical pulse injection, the average deviations of all differentiators are less than 6.2%. The differentiation of pseudo-random bit sequence signals at 5 Gbit/s is also demonstrated. Our scheme is a compact and low-power-consumption solution since the cascaded microring units are fabricated with compact size on the silicon-on-insulator substrate.
52 citations
TL;DR: The flexibility and versatility of photonic differentiators using a silicon-based Mach-Zehnder Interferometer (MZI) structure is proposed and experimentally demonstrated, showing the advantages of compact footprint, flexible functions and versatile differentiation forms.
Abstract: We propose and experimentally demonstrate the flexibility and versatility of photonic differentiators using a silicon-based Mach-Zehnder Interferometer (MZI) structure. Two differentiation schemes are investigated. In the first scheme, we demonstrate high-order photonic field differentiators using on-chip cascaded MZIs, including first-, second-, and third-order differentiators. For single Gaussian optical pulse injection, the average deviations of all differentiators are less than 6.5%. In the second scheme, we demonstrate multifunctional differentiators, including intensity differentiator and field differentiator, using an on-chip single MZI structure. These different differentiator forms rely on the relative shift between the probe wavelength and the MZI resonant notch. Our schemes show the advantages of compact footprint, flexible functions and versatile differentiation forms. For example, high order field differentiators can be used to generate complex temporal waveforms, such as high order Hermite-Gaussian waveforms. And intensity differentiators are useful for ultra-wideband pulse generation.
42 citations
TL;DR: The presented results give indications about the "ultimate" possible improvement of slow light waveguide metrics by using noncircular holes by studying the relative temporal pulse-width spreading with the two-dimensional finite-difference time-domain method.
Abstract: High normalized delay-bandwidth product (NDBP) and wideband slow light are achieved in an alternative row of ellipse-hole photonic crystal waveguide. Two different criteria of flat ratio are adopted. Under a constant group index criterion, a high NDBP of 0.446 with a group index of 42 and a bandwidth of 16.4 nm are obtained by plane wave expansion calculations, while under a low dispersion criterion, the NDBP, group index, and bandwidth come to 0.352, 41, 13.1 nm, respectively. Low dispersion slow light propagation is numerically demonstrated by studying the relative temporal pulse-width spreading with the two-dimensional finite-difference time-domain method. As a whole, the presented results give indications about the “ultimate” possible improvement of slow light waveguide metrics by using noncircular holes.
42 citations
TL;DR: An optoelectronic oscillator (OEO) with wideband frequency tunability and stable output based on a bandpass microwave photonic filter (MPF) has been proposed and experimentally demonstrated.
Abstract: An optoelectronic oscillator (OEO) with wideband frequency tunability and stable output based on a bandpass microwave photonic filter (MPF) has been proposed and experimentally demonstrated. Realized by cascading a finite impulse response (FIR) filter and an infinite impulse response (IIR) filter together, the tunable bandpass MPF successfully replaces the narrowband electrical bandpass filter in a conventional single-loop OEO and serves as the oscillating frequency selector. The FIR filter is based on a tunable multi-wavelength laser and dispersion compensation fiber (DCF) while the IIR filter is simply based on an optical loop. Utilizing a long length of DCF as the dispersion medium for the FIR filter also provides a long delay line for the OEO feedback cavity and as a result, optical tuning over a wide frequency range can be achieved without sacrificing the quality of the generated signal. By tuning the wavelength spacing of the multi-wavelength laser, the oscillation frequency can be tuned from 6.88 GHz to 12.79 GHz with an average step-size of 0.128 GHz. The maximum frequency drift of the generated 10 GHz signal is observed to be 1.923 kHz over 1 hour and its phase noise reaches the -112 dBc/Hz limit of our measuring equipment at 10 kHz offset frequency.
39 citations
TL;DR: An all-optical differentiator-based computation system used for solving constant-coefficient first-order linear ordinary differential equations and an excellent agreement between the numerical simulation and the experimental results is obtained.
Abstract: We propose and experimentally demonstrate an all-optical differentiator-based computation system used for solving constant-coefficient first-order linear ordinary differential equations. It consists of an all-optical intensity differentiator and a wavelength converter, both based on a semiconductor optical amplifier (SOA) and an optical filter (OF). The equation is solved for various values of the constant-coefficient and two considered input waveforms, namely, super-Gaussian and Gaussian signals. An excellent agreement between the numerical simulation and the experimental results is obtained.
37 citations
TL;DR: A feasible integrated scheme to solve all-optical differential equations using microring resonators (MRRs) that is capable of solving first- and second-order linear ordinary differential equations with different constant coefficients is proposed.
Abstract: We propose and experimentally demonstrate a feasible integrated scheme to solve all-optical differential equations using microring resonators (MRRs) that is capable of solving first- and second-order linear ordinary differential equations with different constant coefficients. Employing two cascaded MRRs with different radii, an excellent agreement between the numerical simulation and the experimental results is obtained. Due to the inherent merits of silicon-based devices for all-optical computing, such as low power consumption, small size, and high speed, this finding may motivate the development of integrated optical signal processors and further extend optical computing technologies.
36 citations
TL;DR: The theoretically investigate the possible increase of the second harmonic generation (SHG) efficiency in silicon compatible waveguides by considering an asymmetrical plasmonic slot waveguide geometry and a χ((2)) nonlinear polymer infiltrating the slot.
Abstract: We theoretically investigate the possible increase of the second harmonic generation (SHG) efficiency in silicon compatible waveguides by considering an asymmetrical plasmonic slot waveguide geometry and a χ((2)) nonlinear polymer infiltrating the slot. The needed phase matching condition is satisfied between the fundamental waveguide mode at the fundamental frequency (FF) and second-order waveguide mode at the second harmonic frequency (SHF) by an appropriate design of the waveguide opto-geometrical parameters. The SHG signal generated in our starting waveguide is three orders of magnitude higher than those previously reported for a FF corresponding to λ = 1550 nm. Then, the SHG performance was further improved by increasing the asymmetry of the structure where nonlinear coupling coefficients as large as 292 psm(-1)W(-1/2) are predicted. The device length is shorter than 20 µm and the normalized SHG conversion efficiency comes up to more than 1 × 10(5) W(-1)cm(-2).
35 citations
TL;DR: An all-optical AND logic gate in a single silicon microring resonator is experimentally demonstrated at 10 Gb/s with 50% RZ-OOK signals and clear and open eye diagrams with a bit-error- ratio below 10(-9) are achieved.
Abstract: An all-optical AND logic gate in a single silicon microring resonator is experimentally demonstrated at 10 Gb/s with 50% RZ-OOK signals. By setting the wavelengths of two intensity-modulated input pumps on the resonances of the microring resonator, field-enhanced four-wave mixing with a total input power of only 8.5 dBm takes place in the ring, resulting in the generation of an idler whose intensity follows the logic operation between the pumps. Clear and open eye diagrams with a bit-error- ratio below 10−9 are achieved.
35 citations
Posted Content•
TL;DR: In this article, the interrelation between first-order optical differentiation and optical Hilbert transformation is analyzed and a feasible integrated scheme which can simultaneously function as first order optical differentiation (OFD) and OHD based on a single microdisk resonator is presented.
Abstract: Optical differentiation and optical Hilbert transformation play important roles in communications, computing, information processing and signal analysis in optical domain which offering huge bandwidth. Meanwhile, silicon-based photonic integrated circuits are preferable in all-optical signal processing due to their intrinsic advantages of low power consumption, compact footprint and ultra-high speed. In this study, we analyze the interrelation between first-order optical differentiation and optical Hilbert transformation and then experimentally demonstrate a feasible integrated scheme which can simultaneously function as first-order optical differentiation and optical Hilbert transformation based on a single microdisk resonator. This finding may motivate the development of integrated optical signal processors.
TL;DR: It is proposed that phase regeneration of phase-shift keying signals is theoretically proposed, for the first time, based on the efficient optical parametric amplification process in a highly nonlinear symmetric hybrid plasmonic waveguide.
Abstract: Phase regeneration of phase-shift keying signals is theoretically proposed, we believe for the first time, based on the efficient optical parametric amplification (OPA) process in a highly nonlinear symmetric hybrid plasmonic waveguide. This optimized stacked waveguide with nonlinear organic materials has a relatively low loss of about 0.005 dB/μm and an effective nonlinear OPA coupling coefficient up to 60 ps/m/W1/2. The phase-recovery process was achieved in this waveguide within a length as short as 150 μm.
TL;DR: In this paper, a multichannel mutual format conversion between the non-return-to-zero quadrature phase-shift keying (NRZ-QPSK) and the return-tozero QPSK (RZ-RZ) signals using a single semiconductor optical amplifier and/or a delay interferometer (DI) is proposed.
Abstract: All-optical format conversion is a key function in providing flexible management and interface for optical networks with different formats. In this paper, we propose and demonstrate multichannel mutual format conversions between the nonreturn-to-zero quadrature phase-shift keying (NRZ-QPSK) and the return-to-zero QPSK (RZ-QPSK) signals using a single semiconductor optical amplifier and/or a delay interferometer (DI). The conversion from the NRZ-QPSK to RZ-QPSK is based on the cross phase modulation (XPM) effect, which is introduced by a synchronous optical clock signal with high input power, and subsequent detuned filtering. The amplitude of the NRZ-QPSK signal is converted to the RZ-QPSK signal with identical phase shift onto every input bit by the XPM effect. The conversion from the RZ-QPSK to NRZ-QPSK is based on the constructive interference in a single DI with a half-bit delay. The principle for the mutual conversions is analyzed theoretically, and simulations validate the feasibility of the proposed schemes. Parallel 4 channels format conversions between the NRZ-QPSK and the RZ-QPSK signals are experimentally achieved well with small Q penalty less than 2 dB.
TL;DR: Novel compact in-line optical filters with narrow rejection bandwidths are proposed, and one is experimentally demonstrated based on asymmetric microfiber (MF) couplers that agree well with the theoretical predictions.
Abstract: Novel compact in-line optical filters with narrow rejection bandwidths are proposed, and one is experimentally demonstrated based on asymmetric microfiber (MF) couplers. It is composed of silica and bismuth-oxide-glass MFs and less than 500 μm long. Single transmission dips in a wavelength range of up to 300 nm are obtained, and the transmission extinction ratio is more than 30 dB. Additionally, a −20 dB bandwidth of 0.88 nm is achieved. This narrow bandwidth of the transmission notch benefits from the huge refractive index difference between the two MFs. These experimental results agree well with the theoretical predictions. With the advantages of having a simple structure, being fiberized, and having a small footprint, this device can be an attractive element for micro/nanophotonics, optical sensing, optical signal processing, and optical fiber communications.
TL;DR: It is shown that a silicon-organic hybrid plasmonic waveguide with a thin polymer layer deposited on top of a silicon slab and covered by a metal cap can provide efficient phase-matched second harmonic generation from mid-infrared to near-IR wavelengths.
Abstract: We theoretically investigate the quadratic nonlinear property of a silicon-organic hybrid plasmonic waveguide with a thin polymer layer deposited on top of a silicon slab and covered by a metal cap. Due to the hybridization property of the waveguide modes, efficient phase-matched second harmonic generation (SHG) from mid-infrared (IR) (~3.1 μm) to near-IR (~1.55 μm) wavelengths are achieved with a small fabrication-error sensitivity (225 nm ≤ tolerated waveguide width ≤ 378 nm) and a large bandwidth (Δλ=100 nm). The SHG yield is as large as 8.8% for a pumping power of 100 mW.
TL;DR: In this paper, a photonic approach to generate phase-coded microwave signals with a precise π phase shift was proposed and demonstrated based on a quadrature phase shift keying (QPSK) modulator.
Abstract: A novel photonic approach to generating a phase-coded microwave signal with a precise π phase shift is proposed and demonstrated. The approach is realized based on a quadrature phase shift keying (QPSK) modulator. In the QPSK modulator, one Mach-Zehnder modulator (MZM) is biased at its minimal transmission point to achieve carrier suppressed modulation, and the other paralleled MZM is biased to achieve binary-phase shift keying modulation. When the CSM signal and the BPSK signal are combined at the output port of the QPSK modulator, a phase-coded microwave signal with a precise π phase shift is generated. Both simulation and experiment are carried out to verify our scheme. The scheme exhibits flexible reconfigurability of encoding different bit pattern chips, large bandwidth of phase-encoding, and broadband frequency tunability. In the experiment, phase-coded microwave signals at 5 and 10 GHz with a precise π phase shift are successfully generated.
TL;DR: A novel in-line polarization-dependent microfiber interferometer (PD-MFI) is proposed and experimentally demonstrated, which is tapered from a commercial polarization-maintaining fiber and can be attractive elements in optical signal processing, optical sensing, optical fiber communication, and microwave photonics.
Abstract: A novel in-line polarization-dependent microfiber interferometer (PD-MFI) is proposed and experimentally demonstrated, which is tapered from a commercial polarization-maintaining fiber. Different from conventional MFIs, the transmission spectra of such MFIs are highly polarization-dependent, due to the mode-sensitive birefringence. The experimental results agree well with the theoretical predictions. Moreover, exploiting the polarization-dependent property of PD-MFIs, we demonstrate a simple and flexible scheme of generating polarity-switchable ultra-wideband pulses in the optical domain. Doublet pulses with a central frequency of 6.28 GHz and a 10-dB bandwidth of 7.86 GHz are obtained. Hence, with the advantages of being fiberized, simple fabrication and robustness, these PD-MFIs can be attractive elements in optical signal processing, optical sensing, optical fiber communication, and microwave photonics.
TL;DR: A novel circuit that combines two two-dimensional grating couplers and a microring resonator and shows good performance and the practicability and the bit error ratio measurements show an error free operation.
Abstract: We propose and fabricate a novel circuit that combines two two-dimensional (2D) grating couplers and a microring resonator (MRR). According to the polarization states, one 2D grating coupler first splits the input signals into two orthogonal paths, which co-propagate in the loop and share a common MRR, and then the two paths are combined together by the other 2D grating coupler. The proposed circuit is polarization insensitive and can be used as a polarization insensitive filter. For demonstration, the wavelength division and polarization division multiplexing (WDM-PDM) non return-to-zero differential-phase-shift-keying (NRZ-DPSK) signals can be demodulated successfully. The bit error ratio measurements show an error free operation, reflecting the good performance and the practicability.
TL;DR: In this paper, the phase transition behavior of relaxor ferroelectric Pb(Mg1 ∕3Nb2∕3)O3-xPbTiO3 (PMN-xPT) single crystals derived from temperature-dependent spectral transmittance is investigated.
Abstract: We report band to band transition behaviors of relaxor ferroelectric Pb(Mg1∕3Nb2∕3)O3-xPbTiO3 (PMN-xPT) single crystals derived from temperature-dependent spectral transmittance. A typical bandgap formula with the temperature and composition ( 8 K ≤ T exp ≤ 453 K , 0.1 ≤ x ≤ 0.4 ) has been presented. Moreover, the phase diagram of PMN-xPT crystals can be well proposed, which is based on the bandgap variations and can be explained by electronic structure evolution. It reveals an intrinsic relationship between fundamental bandgap and phase transition of PMN-xPT single crystals, which pioneers an effective methodology to explore the phase transition of ferroelectric oxides.
TL;DR: The device is polarization insensitive and can be used for polarization division multiplexed (PDM) signal processing and the bit error ratio measurements show an error free operation, reflecting the good performance and the practicability of the proposed device.
Abstract: We propose and fabricate a scheme that combines a two-dimensional (2D) grating coupler and a delay interferometer (DI) in a loop configuration. According to the polarization states, the 2D grating coupler first splits the input signals into two paths, which copropagate in the loop and share a common DI, and then combines the two paths together to the same input port. The proposed device is polarization insensitive and can be used for polarization division multiplexed (PDM) signal processing. For demonstration, the PDM non return-to-zero differential-phase-shift-keying signals can be demodulated successfully. The bit error ratio measurements show an error free operation, reflecting the good performance and the practicability of the proposed device.
TL;DR: In this article, the authors theoretically demonstrate the multibistability and multistability features of two coupled active microrings using the continuation method to solve the parametric nonlinear equations of these two-active-microring systems.
Abstract: We theoretically demonstrate the novel multibistability and multistability features of two coupled active microrings. The continuation method is utilized to solve the parametric nonlinear equations of these two-active-microring systems, and the bifurcation theory is used to investigate the special points, which exist in continuation process. The novel results, which are interpreted by the nonlinear transmission spectrum, arise from gain saturation and the optical field coupling between these two nonlinear rings. Besides the common multibistability, which consists of serial S-shaped hysterical loops, the multibistability, which takes on novel shapes, such as the hat-shaped, knife-shaped, S-shaped butterfly, and inverted double-S-shaped is also demonstrated. The novel multistability includes inverted double-S-shaped tristability, woodpecker-shaped tristability, duke-shaped tristability, grasshopper-shaped tristability, and pseudo-quadristability. The electrical and optical control processes of the stability about these two coupled active microrings are also investigated. Results show that the on-off jumping threshold of this stability can be adjusted via changing the power of the light, which inputs from the add-drop port, and the type of this stability can also be changed by altering the injected current on each active microring.
TL;DR: In this article, a delay interferometer cascaded with an arrayed-waveguide grating based on silicon on insulator was designed and fabricated, and the 4-channel return-to-zero on-off keying (RZ-OOK) to non-return-to zero on-on keying format conversion at 40 Gbit/s was realized with this integrated device.
Abstract: Format conversion is enabling function at the interface of different networks with different optimal modulation formats. Meanwhile, multi-channel signal processing function has its special significance for dense wavelength division multiplexing networks. In this paper, we designed and fabricated a delay interferometer cascaded with an arrayed-waveguide grating based on silicon on insulator. The 4-channel return-to-zero on-off keying (RZ-OOK) to non-return-to-zero on-off keying (NRZ-OOK) and return-to-zero differential phase shift keying (RZ-DPSK) to non-return-to-zero differential phase shift keying (NRZ-DPSK) format conversions at 40 Gbit/s were realized with this integrated device, the output eye diagrams showed a good conversion performance. Thanks to the mature fabrication technology, this device shows great potential for its small size, low power consumption and possibility of monolithic integration.
TL;DR: In this article, a scheme to implement photonic multi-shape ultra-wideband (UWB) signal generation using a semiconductor optical amplifier (SOA) based nonlinear optical loop mirror (NOLM) is presented.
Abstract: We propose and demonstrate a scheme to implement photonic multi-shape ultra-wideband (UWB) signal generation using a semiconductor optical amplifier (SOA) based nonlinear optical loop mirror (NOLM). By employing the cross phase modulation (XPM) effect, cross gain modulation (XGM), or both, multi-shape UWB waveforms are generated including monocycle, doublet, triplet, and quadruplet pulses. Both the shapes and polarities of the generated pulses are flexible to adjust, which may be very useful in UWB pulse shape modulation and pulse polarity modulation.
TL;DR: In this article, a microwave photonic filter with a single passband between 0 and 40 GHz was obtained, and the center frequency, the −3dB bandwidth and the −30dB bandwidth of the microwave filter were 18.3, 3.184 and 4.005 GHz respectively.
30 Jun 2013
TL;DR: In this article, an all-optical clock recovery scheme with wide range of 12GHz was proposed and demonstrated using a silicon microring resonator assisted by an amplitude equalizer.
Abstract: An all-optical clock recovery scheme with wide range of ~12GHz is proposed and demonstrated using a silicon microring resonator assisted by an amplitude equalizer. Single and dual channel clock recovery at 40Gb/s has been achieved.
26 Jul 2013
TL;DR: In this article, an all-optical on-line chromatic dispersion (CD) monitoring technique for 40 Gbit/s return-to-zero on-off-keying (RZ-OOK) signal using the four wave mixing (FWM) effect of semiconductor optical amplifier (SOA).
Abstract: We propose and experimentally demonstrate an all-optical on-line chromatic dispersion (CD) monitoring technique for 40 Gbit/s return-to-zero on-off-keying (RZ-OOK) signal using the four wave mixing (FWM) effect of semiconductor optical amplifier (SOA). The received signal, whose carrier frequency is suppressed by a fiber bragg grating (FBG), is launched into the SOA together with a continuous wave. The optical power of one idle wave is considered to be the autocorrelation of the signal's sideband and used for CD monitoring. The CD up to 90 ps/nm is monitored for the RZ signal, and the effects of the polarization mode dispersion (PMD) and wavelength misalignment are also discussed and experimentally investigated. This scheme requires neither modification at transmitter nor complicated digital signal processing at receiver. Furthermore, it is operated in all-optical, and has the potential to be applied to the higher speed system with optical time division multiplexed (OTDM) technique.
TL;DR: In this article, the amplitude regeneration for non-return-to-zero differential-phase-shift-keying (NRZ-DPSK) signal at 40Gb/s with two cascaded semiconductor optical amplifiers (SOAs) and a subsequent delay interferometer (DI).
TL;DR: 4-channel dual polarization signals can be simultaneously amplitude regenerated without introducing wavelength and polarization demultiplexing and an average power penalty improvement of 1.75dB can be achieved for the WDM-PDM signals.
Abstract: We propose and demonstrate all-optical amplitude regeneration for the wavelength division multiplexing and polarization division multiplexing (WDM-PDM) return-to-zero phase shift keying (RZ-PSK) signals using a single semiconductor optical amplifier (SOA) and subsequent filtering. The regeneration is based on the cross phase modulation (XPM) effect in the saturated SOA and the subsequent narrow filtering. The spectrum of the distorted signal can be broadened due to the phase modulation induced by the synchronous optical clock signal. A narrow band pass filter is utilized to extract part of the broadened spectrum and remove the amplitude noise, while preserving the phase information. The working principle for multi-channel and polarization orthogonality preserving is analyzed. 4-channel dual polarization signals can be simultaneously amplitude regenerated without introducing wavelength and polarization demultiplexing. An average power penalty improvement of 1.75dB can be achieved for the WDM-PDM signals.
30 Jun 2013
TL;DR: In this paper, a single SOA and a silicon-based integrated multi-channel comb filter and AWG were used for NRZ to RZ conversion with the same bit error ratio.
Abstract: 4*20Gb/s NRZ to RZ conversions are experimentally demonstrated using a single SOA and a silicon based integrated multi-channel comb filter and AWG. Bit error ratio measurements show the good performance for the proposed scheme.
30 Jun 2013
TL;DR: In this paper, the effect of nonlinear loss on the bus waveguide length and MRR position was quantified in silicon micro-ring resonators and nanowires under four-wave mixing.
Abstract: Wavelength conversion based on four-wave mixing is theoretically compared in silicon micro-ring resonators and nanowires under the effect of nonlinear loss. The impact of the bus waveguide length and MRR position are also quantified.