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Journal ArticleDOI

Optimal Design of Thin Film Filters for IR Integrated Photonic Amplifiers

Haiyan Chen1
25 Jul 2005-International Journal of Infrared and Millimeter Waves (Kluwer Academic Publishers-Plenum Publishers)-Vol. 26, Iss: 8, pp 1141-1150
TL;DR: In this paper, a cascaded multilayer medium thin film filter structure is presented, which consists of some different filtering unit cells with different central wavelength and bandwidth, and each cell can suppress certain peak gain at a specific wavelength.
Abstract: This paper addresses in the design of thin film filter for IR broadband integrated photonic amplifiers. A cascaded multilayer medium thin film filter structure is presented. This proposed filter consists of some different filtering unit cells with different central wavelength and bandwidth, and each cell can suppress certain peak gain at a specific wavelength. The intrinsical gain spectrum of amplifier is obtained by solving a set of rate and power propagation equations with finite difference time-domain(FDTD)-based overlapping integral-Runge Kutter(RK) method. The effect of transmittance spectrum of the proposed cascaded multilayer medium thin film filter on flattening gain is discussed. The transmission function of the cascaded multilayer medium thin film filter is obtained. Finally, a real device is fabricated, it is shown that the design is valid.
Citations
More filters
Journal ArticleDOI
Haiyan Chen1
TL;DR: In this article, a broadband IR integrated Er-Yb codoped phosphate glass waveguide amplifier with a long-period waveguide grating is proposed, which is used as a gain equalizer.
Abstract: A novel broadband IR integrated Er-Yb codoped phosphate glass waveguide amplifier with a long-period waveguide grating is proposed. The long-period waveguide grating, which is used as a gain equalizer, is directly fabricated in the waveguide. The amplifier model is based on propagation and population-rate equations and includes both uniform and pair-induced up-conversion mechanisms. It is solved numerically by combining overlapping integral and Runge-Kutta(RK) algorithm. The intrinsical gain spectrum of the proposed amplifier is obtained by solving a set of rate and power propagation equations and, the deleterious gain peaking is reduced by the long-period waveguide grating filter. The effects of transmission spectrum of the proposed long-period grating on flattening gain are discussed. An average gain ~ 20dB between 1532 nm and 1565 nm with gain difference of < 3dB is achieved.

9 citations

Proceedings ArticleDOI
TL;DR: In this paper, a monolithic dual-waveband InGaAs detector was designed and fabricated with mea sa structure and Fabry-Perot ca vity by thermal evaporation.
Abstract: According to excellent photoelectric properties of InGaAs epitaxial material, and important application of the spectral bands at center wavelength of 1.38 µm and 1.60µm, the new-type monolithic dual-band InGaAs detector is studied in this paper. The detector was designed and fabricated with me sa structure and Fabry-Perot ca vity by thermal evaporation. The current-voltage characteristics, response spectra of mono lithic detector were measured. The bandwidths of 1.38 µm and 1.60µm waveband detector are 46nm and 54 nm respectively. A 400×2 dual-waveband monolithic detector was wire-bonded with two 400×1 readout circuits, to form 400×2 dual-waveband InGaAs focal plane arrays (FPAs). At room temperature, the detectivity D*, non-uniformity, response bandwidth and the non-operative pixel ratio of 1.38 µm waveband FPAs are 7.71×10 11 cmHz 1/2 /W, 6.20%, 46nm and 0.25%, respectively, and the ones of 1.60 µm waveband FPAs are 6.06×10 11 cmHz 1/2 /W, 3.20%, 54nm and 0.25%, respectively. The monolithic dual-waveband InGaAs focal plane arrays (FPAs) plays an important roles in developing compact, low-cost and high-precision photoelectric detection (imaging) system. Keywords: InGaAs; dual-waveband; monolithic in tegration; filter microstructure

5 citations


Cites background from "Optimal Design of Thin Film Filters..."

  • ...These problems can be alleviated by monolithic combination of filter microstructure and high-performance infrared (IR) detector([1-2])....

    [...]

Journal ArticleDOI
TL;DR: In this article, a gain-flattening filter for an erbium-doped waveguide amplifier using a dual-core resonant leaky waveguide was proposed.
Abstract: This article gives the design of a gain-flattening filter for an erbium-doped waveguide amplifier using a dual-core resonant leaky waveguide. The spectral variation of leakage loss of the waveguide has been used for gain equalization of the erbium-doped waveguide amplifier in the conventional (C) band. Leakage loss of the structure has been calculated by using the transfer matrix method. Numerical simulation results show a 17.5-dB gain with a gain excursion of ±1.35 dB in the C-band (1,526 nm–1,566 nm) of a typical erbium-doped waveguide amplifier. The study should be useful in designing integrated optic gain-flattening filters.

4 citations


Cites background from "Optimal Design of Thin Film Filters..."

  • ...There have also been reports on cascaded multilayer thin film filters [10]....

    [...]

Proceedings ArticleDOI
TL;DR: In this article, a long-period grating in a trench assisted planar waveguide was designed to obtain gain flattening filter for EDWA, which achieved 18.5±1.1 dB gain in the wavelength range 1526 - 1561 nm.
Abstract: We design long-period grating in a trench assisted planar waveguide to obtain gain flattening filter for EDWA. Our numerical results show 18.5±1.1 dB gain in the wavelength range 1526 - 1561 nm using the designed filter.

2 citations


Cites background from "Optimal Design of Thin Film Filters..."

  • ...Cascaded multilayer thin film filter has also been proposed to improve gain flattening [8]....

    [...]

Proceedings ArticleDOI
Haiyan Chen1
02 Nov 2009
TL;DR: In this paper, a cascaded long-period waveguide grating gain equalizer is proposed to suppress peak gain at a specific wavelength, and the intrinsic gain spectrum is obtained by solving a set of rate and power propagation equations with overlapping integral-Runge Kutter method.
Abstract: Broadband integrated Er-Yb codoped phosphate glass waveguide amplifier based on cascaded long-period waveguide grating gain-equalizer is proposed. The proposed cascaded long-period waveguide grating gain-equalizer consists of some different long-period waveguide grating filtering unit cells, and each cell can suppress certain peak gain at a specific wavelength. The intrinsical gain spectrum of amplifier is obtained by solving a set of rate and power propagation equations with overlapping integral-Runge Kutter method. The effect of the transmission spectrum of the proposed cascaded long-period waveguide grating on the flattening gain of Er-Yb codoped phosphate glass waveguide amplifier is discussed. The transmission function of the cascaded long-period waveguide grating filter is obtained.

2 citations


Additional excerpts

  • ...45 4 54 5 54 5 R n R n A n − + + 1 5 0 cr C n n + = (8)...

    [...]

References
More filters
Journal ArticleDOI
D. E. McCumber1
TL;DR: In this article, the relationship described by Einstein connecting the rates of spontaneous emission, stimulated emission, and absorption of radiation by an atomic system in free space is generalized to apply to broadband spectra of quantized systems dilutely distributed in a dielectric medium.
Abstract: Relations described by Einstein connecting the rates of spontaneous emission, stimulated emission, and absorption of radiation by an atomic system in free space are generalized to apply to broadband spectra of quantized systems dilutely distributed in a dielectric medium. Although the gross features of the broadband emission and absorption spectra can be qualitatively different (especially at low temperatures), the various spectra are connected at any specific frequency by simple expressions. For a two-level system imbedded in a medium at temperature $T$, typical equations connecting stimulated-emission and absorption cross sections $\ensuremath{\sigma}(\ensuremath{\omega})$ to the rate $f(\ensuremath{\omega})$ of spontaneous emission of photons per unit solid angle per unit frequency interval are: ${\ensuremath{\sigma}}_{e}(\ensuremath{\omega})={\ensuremath{\sigma}}_{a}(\ensuremath{\omega})\mathrm{exp}[\frac{\ensuremath{\hbar}(\ensuremath{\mu}\ensuremath{-}\ensuremath{\omega})}{\mathrm{kT}}]=f(\ensuremath{\omega}){(\frac{2\ensuremath{\pi}c}{\ensuremath{\omega}n})}^{2}$, where $\ensuremath{\hbar}\ensuremath{\mu}$ is a temperature-dependent excitation potential and $n$ is the index of refraction of the host material.

1,025 citations

Journal ArticleDOI
TL;DR: In this paper, an 8/spl times/2.5 Gb/s wavelength division multiplexing metropolitan ring network with erbium-doped waveguide amplifiers is presented.
Abstract: We demonstrate an 8/spl times/2.5 Gb/s wavelength-division-multiplexing metropolitan ring network in which each network-sourced wavelength constitutes a distinct multiuser virtual ring. The ring's four nodes feature erbium-doped waveguide amplifiers, which promise future integrability.

59 citations

Proceedings ArticleDOI
07 Mar 2000
TL;DR: In this paper, the broad gain and gain flatness spectra (1530-1565 nm) of a 14 cm long Er/sup 3+/ doped aluminosilicate waveguide amplifier was reported.
Abstract: We report on the broad gain and gain flatness spectra (1530-1565 nm) of a 14 cm long Er/sup 3+/ doped aluminosilicate waveguide amplifier pumped at 1470 nm. We demonstrate its successful use as an in-line amplifier in an 8 channels WDM 155 Mbit/s transmission fiber experiment.

17 citations

Journal ArticleDOI
TL;DR: In this article, a novel wideband and high gain waveguide-amplifier structure, which consists of a folded geometry erbium-ytterbium co-doped phosphate glass waveguide integrated with a cascaded multilayer medium thin-film filter (CMMTFF), is proposed.
Abstract: A novel wideband and high-gain waveguide-amplifier structure, which consists of a folded geometry erbium-ytterbium co-doped phosphate glass waveguide integrated with a cascaded multilayer medium thin-film filter (CMMTFF), is proposed. This CMMTFF consists of some different filter-unit cells with different central wavelengths and bandwidths, and each of them can suppress a certain gain peak at a specific wavelength. The gain characteristics of this new optical amplifiers is obtained. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 64–66, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20208

13 citations

Journal ArticleDOI
TL;DR: In this article, a new S-type IR integrated waveguide amplifiers, based on erbium-ytterbium co-doped phosphate glass integrated with medium thin film filter, is proposed.
Abstract: A new S-type of IR integrated waveguide amplifiers, based on erbium-ytterbium co-doped phosphate glass integrated with medium thin film filter, is proposed. The intrinsical gain spectrum of the proposed amplifier is obtained by solving rate and power propagation equations, a thin film filter flattening this intrinsical gain spectrum is designed by genetic algorithm, and fabricated. An average gain >10dB is obtained between 1530nm and 1560nm, and the average gain about 18dB between 1531nm and 1550nm with gain difference of <3dB is achieved.

12 citations