Polarization-insensitive SOA with a strained bulk active layer for network device application

Itoh, Masatoshi; Shibata, Y.; Kakitsuka, Takaaki; Kadota, Y.; Tohmori, Y.

doi:10.1109/lpt.2002.1003086

Cited by 15 publications

(10 citation statements)

References 6 publications

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“…In this way the TM gain is increased to a level where it compensates for the higher TE gain. This balancing of the gains can be understood by considering the following expression [11]:…”

Section: Ingeniare Revista Chilena De Ingeniería Vol 15 Nº 3 2007mentioning

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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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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“…In this way the TM gain is increased to a level where it compensates for the higher TE gain. This balancing of the gains can be understood by considering the following expression [11]:…”

Section: Ingeniare Revista Chilena De Ingeniería Vol 15 Nº 3 2007mentioning

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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“…2. Applying this to (17) and (19), we get (20) (21) Differentiating (9) with respect to (22) Substituting (20) and (21) in (22) gives (23) Solving (16) and (18), we get the following expressions for the intensities corresponding to TE and TM modes along the SOA: (24) (25) where and are given by…”

Section: Approximate Analysismentioning

confidence: 99%

“…However, it should be noted that the output pulse will be delayed in real time with respect to the input pulse by the time it takes to transit through the amplifier. Taking the logarithm of (26) and (27) and differentiating with respect to , we get (28) Substituting (23) in (28) yields (29) After substituting (16), (18), (24), and (25) in (29) and integrating with respect to , we get (30) In order to evaluate the integral, we make the assumption, to be relaxed later, that differential gain is uniform along the SOA [17]. This implies there exists uniform gain coefficients , , such that and .…”

Section: Approximate Analysismentioning

confidence: 99%

“…In such SOAs, the dependence of the polarization sensitivity on the wavelength and the gain can be varied by varying the tensile strain [11], [12]. It has been shown that error-free inverted and noninverted wavelength conversion at data-rates up to 10 Gb/s can be realized using this phenomenon [13].…”

mentioning

confidence: 99%

“…In a SOA with a rectangular active layer structure, the confinement factor of the TE polarization is larger than that of TM polarization. However, this difference, and hence the polarization sensitivity, is varied by introducing a small tensile-strain into the active layer [16]. The tensile strain built into the bulk medium causes TM to be favoured over TE transitions.…”

mentioning

confidence: 99%

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Analytical Characterization of Optical Pulse Propagation in Polarization-Sensitive Semiconductor Optical Amplifiers

Pillai

Premaratne

Abramson

et al. 2006

IEEE J. Quantum Electron.

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Abstract-In this paper, we perform analytical characterization of optical pulses propagating through a polarization-sensitive semiconductor optical amplifier (SOA). We derive analytical expressions for the carrier density, gain and phase evolution along the SOA and show how these expressions prove useful in optical signal processing applications. The propagation of counter-propagating pulses as well as pulse streams across SOAs have been analysed and expressions for energy gain have been derived in all these cases. We also show that our analytical results reduce to corresponding results of polarization insensitive SOAs already published. The analytical results are in excellent agreement with detailed numerical simulations done in MATLAB using the NIMROD portal. The analytical calculations lead to significant savings with regard to simulation time and processing capacity requirements. We further prove that the energy gain difference for counter-propagating pulse streams is directly proportional to the difference delay between in them and hence can be used as a measure of the delay difference. This theoretical result agrees well with experimental results.Index Terms-Analytical results, polarization sensitivity, semiconductor optical amplifier (SOA).

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Band Structure Engineering of Semiconductor Devices for Optical Telecommunications

Carrère

Marie

2012

Semiconductor Modeling Techniques

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Polarization-insensitive SOA with a strained bulk active layer for network device application

Cited by 15 publications

References 6 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

Analytical Characterization of Optical Pulse Propagation in Polarization-Sensitive Semiconductor Optical Amplifiers

Band Structure Engineering of Semiconductor Devices for Optical Telecommunications

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