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Extinction ratio

About: Extinction ratio is a research topic. Over the lifetime, 8541 publications have been published within this topic receiving 111908 citations.


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Journal ArticleDOI
TL;DR: In this paper, a novel technique for optical multiplexing of label and payload using optical carrier suppression and separation is proposed and experimentally demonstrated, where no power penalty is observed when the payload and label, with signal extinction ratio > 11 dB, are transmitted over 60-km standard single-mode fiber with full-dispersion compensation.
Abstract: A novel technique for optical multiplexing of label and payload using optical carrier suppression and separation is proposed and experimentally demonstrated. No power penalty is observed when the payload and label, with signal extinction ratio >11 dB, are transmitted over 60-km standard single-mode fiber with full-dispersion compensation. The technique of the optical label generation offers many advantages compared with previous techniques.

71 citations

Journal ArticleDOI
TL;DR: In this article, the feasibility of implementing an ultrafast NOT gate by means of a two-input Mach-Zehnder interferometer that employs quantum-dot semiconductor optical amplifiers (QD-SOAs) is theoretically explored and shown.
Abstract: The feasibility of implementing an ultrafast NOT gate by means of a two-input Mach–Zehnder interferometer (MZI) that employs quantum-dot semiconductor optical amplifiers (QD-SOAs) is theoretically explored and shown. For this purpose a numerical treatment is conducted by modeling the propagation of strong pulses through a QD-SOA and the resultant change of the QD-SOA gain dynamics. This procedure allows to evaluate the impact of the critical parameters on the MZI complementary output port and find which is the most appropriate way to be selected and combined. The analysis of the simulation results reveals that with the non-data driven QD-SOA constantly held in the linear gain regime, the other QD-SOA, which is perturbed by the data to be logically inverted, must be operated in a nonlinear regime. This is defined by the drop of the specific QD-SOA gain by approximately 5.5 dB from its unsaturated value, which is caused by a data peak power being 4 dB higher than its saturation input power. Moreover, in order for the design to be complete, both QD-SOAs must be of medium length, provide a maximum modal gain such that their net gain exceeds by two orders of magnitude that at transparency, be biased at moderate current density and exhibit an electron relaxation time from the excited state to the ground state as fast as possible. Provided that these conditions are satisfied then a more than adequate extinction ratio can be obtained, which ensures that Boolean NOT logic is executed at 160 Gb/s both with logical correctness and high quality using QD-SOAs in a structurally simple, power efficient and operationally flexible version of the MZI.

70 citations

Journal ArticleDOI
TL;DR: A Mach-Zehnder interferometer (MZI) coupled microring is demonstrated experimentally to obtain a high sensitivity as well as a large range for measuring change in refractive index.
Abstract: A Mach–Zehnder interferometer (MZI) coupled microring is demonstrated experimentally to obtain a high sensitivity as well as a large range for measuring change in refractive index. For the present MZI-coupled microring, there is a major resonance wavelength with a high extinction ratio (16–36 dB) in a very large wavelength span. Consequently, a very large quasi-free spectral range (>120nm) is achieved, which helps to obtain a large measurement range. The MZI-coupled microring sensor is used for measuring the change of the ambient refractive index ranging from 1.0 to 1.538, and the sensitivity is as high as 111nm/refractive index unit.

70 citations

Journal ArticleDOI
TL;DR: In this paper, a transverse electric (TE)-pass polarizer was implemented on a silicon-on-insulator (SONI) platform and experimentally demonstrated that the measured polarization extinction ratio (ER) was ∼30 dB, and the average insertion loss was 0.4 dB in the wavelength range of 1470-1580 nm.
Abstract: We propose and experimentally demonstrate a novel approach to implement a low-loss, broadband, and compact transverse electric (TE)-pass polarizer on a silicon-on-insulator platform. The TE-polarizer utilizes a subwavelength grating (SWG) structure to engineer the waveguide equivalent material index. In this paper, the SWG-based polarizer only supports its fundamental TE mode, whereas the transverse magnetic (TM) mode is suppressed under the cutoff condition, i.e., the TM mode leaks from the waveguide with low reflection. The simulations predict that the bandwidth to achieve a polarization extinction ratio (ER) of 35 dB exceeds 200 nm. Experimentally, the measured polarization ER is ∼30 dB, and the average insertion loss is 0.4 dB in the wavelength range of 1470–1580 nm. The fabricated TE-polarizer has a compact length of 60 $\mu\textrm{m}$ .

70 citations

Journal ArticleDOI
TL;DR: A fiber polarizer has been made using an etched D-shaped fiber coated with indium and the effect of coupling between the polarized modes within the polarizer is to produce a saturation in the observed extinction ratio beyond a critical length.
Abstract: A fiber polarizer has been made using an etched D-shaped fiber coated with indium. For a 39-dB extinction ratio, 0.2-dB loss has been obtained. An analysis shows that the effect of coupling between the polarized modes within the polarizer is to produce a saturation in the observed extinction ratio beyond a critical length.

70 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023187
2022429
2021371
2020449
2019468
2018441