Demultiplexing using polarisation rotation in a semiconductor laser amplifier

Patrick, D.M.; Ellis, A.D.; Davies, D. A. L.; Tatham, M.C.; Sherlock, G.

doi:10.1049/el:19940197

Cited by 40 publications

(17 citation statements)

References 4 publications

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“…An index difference as small as 2x10 -4 has been reported as being sufficiently high to induce a phase shift between the TE and TM modes of 90 o [6]. Many of the initial publications based on NPR justified the effect as being solely due to the asymmetric waveguide [5,6]. These papers also report an increase in the NPR due to birefringence as a function of injected power in the SOA.…”

Section: The Causes Of Npr In a Bulk Soa Devicementioning

confidence: 63%

“…These techniques take advantage of a modulation of either the gain or the phase of the device in order to perform all-optical signal processing, however, each one is limited by the polarization sensitivity in the SOA. The technique presented in this paper aims to take advantage of this inherent polarization sensitivity using the Nonlinear Polarization Rotation (NPR) effect in the device to perform Cross-Polarization Modulation (XPolM) [5,6]. This effect occurs when a signal with a known state of polarization is injected into an SOA.…”

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confidence: 99%

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The Use of Polarization Effects in Semiconductor Optical Amplifiers to Perform All-Optical Signal Processing

Kennedy

Surre

Philippe

et al. 2007

Ingeniare. Rev. chil. ing.

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RESUMENEn los servicios de telecomunicaciones, la necesidad de hacer uso intensivo de las aplicaciones ha presionado por un constante incremento del ancho de banda. Particularmente una de las tecnologías más promisorias, que ha permitido estos incrementos de ancho de banda, son los elementos ópticos, de tal manera que en las redes de comunicación los elementos electrónicos sean sustituidos por dichos elementos ópticos. En esta publicación se discute una técnica basada en la rotación no lineal del estado de polarización de una señal óptica conectada al amplificador semiconductor óptico. Se presenta un experimento, basado en este efecto, para realizar la conversión a 2,5 Gbits/s. La característica del conversor de longitud onda es probada en propagación directa e inversa. Se ha encontrado que conversión de la longitud de onda es independiente de longitud de onda (la conversión no depende del valor de la longitud de onda) en la modalidad de propagación directa no invertida.Palabras clave: Amplificador semiconductor óptico, conversión de la longitud de onda, rotación no lineal del estado de polarización. ABSTRACTAs the need for higher and higher bandwidths in telecommunication systems continues, it is widely predicted that at some point in the future optical processing will need to be performed all-optically. Several techniques have been proposed to perform such all-optical signal processing. In this paper a technique based on the nonlinear rotation in the state of polarization of an optical signal injected into a bulk semiconductor optical amplifier is discussed. An experiment to perform wavelength conversion at 2.5 Gbit/s based on this effect is presented. The performance of the wavelength converter is tested in both co-and counter-propagation, and wavelength independent wavelength conversion is found in the non-inverted co-propagation setup.

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Section: The Causes Of Npr In a Bulk Soa Devicementioning

confidence: 63%

mentioning

confidence: 99%

The Use of Polarization Effects in Semiconductor Optical Amplifiers to Perform All-Optical Signal Processing

Kennedy

Surre

Philippe

et al. 2007

Ingeniare. Rev. chil. ing.

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“…Chen and Liu early performed polarization switching in an InGaAsP/InP laser [2]. Till now many schemes have been proposed such as the polarization-encoded optical logic based on the digital correlation of speckle patterns [3], 16 two-input logic operations by photoinduced volume gratings in photorefractive crystals [4], ect.. However most of them focus on polarization dependent optical computation not the communication application.…”

Section: Introductionmentioning

confidence: 98%

Digital polarization encoding based on orthogonal polarization rotation in a semiconductor optical amplifier

Yang

et al. 2008

Optoelectronic Materials and Devices III

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We investigate the polarization-dependent mode gains and polarization rotation (PR) of the semiconductor optical amplifier in pump-probe scheme, and find that the relationship between polarization rotation (PR) and mode gains keeps well under different pump power. Thus we can simply obtain the PR angle by measurement of the mode gains. Choosing suitable injected current we realize the orthogonal polarization rotation by pump laser with power of ~3.5 mW. Then we propose a novel digital polarization encoding scheme and perform it well in a 10-km fiber transmission system with data rate at 2.5 G-bit/s, which is promising to promote the optical power-equalized encoding communications.

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“…2) To obtain optical switching the SOA is usually placed in an interferometer. Optical switching in the picosecond regime has been shown using a variety of configurations such as the symmetric Mach-Zehnder (SMZ) interferometer, the ultrafast nonlinear interferometer (UNI) and the Terahertz optical asymmetric demultiplexer (TOAD) [3][4][5][6][7][8] In most applications, SOAs are operated by utilizing nonlinearities introduced by resonant optical transitions. The speed of all-optical switches based on SOA nonlinearities is determined by the carrier dynamics of the SOA.…”

Section: Introductionmentioning

confidence: 99%

All-Optical Switching and Wavelength Conversion Based on Ultrafast Nonlinearities in Semiconductor Optical Amplifiers

Dorren

Mishra

Yang

et al. 2004

Jpn. J. Appl. Phys.

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We investigate all-optical switching and wavelength conversion based on ultrafast nonlinearities in a multi-quantum-well semiconductor optical amplifier. We present a rate equation model that accounts for two-photon absorption, free-carrier absorption, self-and cross phase modulation, carrier heating, spectral, spatial hole burning and self-and cross polarization modulation. We demonstrate optical AND gate operation using a semiconductor optical amplifier placed in an asymmetric March-Zehnder interferometer and we show that the gate can be operated using 800 fJ optical pulses with duration of 200 fs. We also investigate wavelength conversion based on ultrafast nonlinear polarization rotation. We found a conversion efficiency of 12 dB for control pulse energies of 10 pJ.

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Demultiplexing using polarisation rotation in a semiconductor laser amplifier

Cited by 40 publications

References 4 publications

The Use of Polarization Effects in Semiconductor Optical Amplifiers to Perform All-Optical Signal Processing

The Use of Polarization Effects in Semiconductor Optical Amplifiers to Perform All-Optical Signal Processing

Digital polarization encoding based on orthogonal polarization rotation in a semiconductor optical amplifier

All-Optical Switching and Wavelength Conversion Based on Ultrafast Nonlinearities in Semiconductor Optical Amplifiers

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