Nonlinearities in Active Media

Hall, Kenneth C.; Thoen, E.R.; Ippen, Erich P.

doi:10.1016/s0080-8784(08)62731-3

Cited by 17 publications

(13 citation statements)

References 159 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Owing to their large differential gain, ∂g/∂ N [7], and large inhomogeneously broadened spectrum, enhanced features such as a small linewidth enhancement factor, a low threshold current density [4,8,9], a large saturation power [7,10] and ultra-fast gain recovery times [11][12][13][14][15][16] have been demonstrated. For the latter, pump-probe spectroscopy using short optical pulses [17,18] has served as an efficient tool for simultaneous measurement of the ultra-fast temporal gain and refractive index dynamics [19].…”

Section: Introductionmentioning

confidence: 99%

“…Typically, most pump-probe experiments are carried out in the linear regime, allowing a relatively straightforward extraction of time constants by fitting [19,20] to the theoretical response [21] of the active medium, including the effects of carrier depletion, spectral holeburning, carrier heating and two-photon absorption (TPA). For the interpretation of such linear pump-probe measurements, the influence of free carrier absorption (FCA) is usually neglected, except for its contribution to loss and carrier heating, the latter being significant in particular around the transparency point [22].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nonlinear carrier dynamics in a quantum dash optical amplifier

Lunnemann

Yvind

et al. 2012

New J. Phys.

View full text Add to dashboard Cite

Abstract. The results of experimental pump-probe spectroscopy of a quantum dash optical amplifier biased at transparency are presented. Using strong pump pulses we observe competition between free carrier absorption and two-photon-induced stimulated emission that can have drastic effects on the transmission dynamics. Thus, both an enhancement as well as a suppression of the transmission can be observed even when the amplifier is biased at transparency. A simple theoretical model taking into account two-photon absorption and free carrier absorption is presented that shows good agreement with the measurements.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nonlinear carrier dynamics in a quantum dash optical amplifier

Lunnemann

Yvind

et al. 2012

New J. Phys.

View full text Add to dashboard Cite

show abstract

“…All-optical switches based on nonlinearities in Semiconductor Optical Amplifiers (SOAs) are considered important building blocks in optical telecommunication systems [1][2][3][4]. Several SOA-based switching techniques have been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

SOA-based all-optical switch with subpicosecond full recovery

Ju¹,

Zhang²,

Lenstra³

et al. 2005

Opt. Express

View full text Add to dashboard Cite

Abstract:We investigate all-optical switching in a multi-quantum-well semiconductor optical amplifier-based nonlinear polarization switch using optical pulses with duration of 200 fs at a central wavelength of 1520 nm. We show full recovery of the switch within 600 fs, in both the gain and absorption regime. We discuss the switching and recovery mechanisms using numerical simulations that are in qualitatively good agreement with our experimental data. 2933 (1996). 10. S. Nakamura, Y. Ueno, and K. Tajima, "Ultrafast (200-fs switching, 1.5-Tb/s demultiplexing) and highrepetition (10 GHz) operations of a polarization discriminating symmetric Mach-Zehnder all-optical switch," IEEE Photon. Technol. Lett. 10, 1575 (1998). ©2005 Optical Society of America

show abstract

“…Usually, this approach needs two SOAs integrated on a single chip, which makes it more difficult to control the interferometric arrangement (e.g., Mach-Zehnder) [1], [5]. Wavelength conversion utilizing four-wave mixing (FWM) offers strict transparency, including modulation-format and bit-rate transparency, and is capable of multiwavelength conversions.…”

Section: Introductionmentioning

confidence: 99%

“…Wavelength conversion utilizing four-wave mixing (FWM) offers strict transparency, including modulation-format and bit-rate transparency, and is capable of multiwavelength conversions. However, it has low conversion efficiency and needs careful control of the polarization of the input lights [5]. A promising approach to wavelength conversion, which is based on cross polarization modulation (XPolM) utilizing signalinduced anisotropy of nonlinear refraction and absorption in SOAs, has attracted particular interest recently, although the operation had already been demonstrated [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Signal-induced birefringence and dichroism in a tensile-strained bulk semiconductor optical amplifier and its application to wavelength conversion

Guo

Connelly

2005

J. Lightwave Technol.

View full text Add to dashboard Cite

Abstract-Signal-induced birefringence and dichroism in a tensile-strained bulk semiconductor optical amplifier (SOA) are demonstrated in a counterpropagation scheme. The polarization azimuth rotation and the change of ellipticity angle of the probe light are presented on the Poincaré sphere and can be calculated by the Stokes parameters. All-optical wavelength conversion (inverted/noninverted and upconversion/downconversion) based on cross polarization modulation (XPolM) in SOAs are investigated. It is shown that a bit error rate (BER) of < 10 −9 can be achieved and an extinction ratio of > 9 dB can be obtained at a bit rate of 2.488 Gb/s with a 2 31 − 1 non-return-to-zero (NRZ) pseudorandom bit sequence (PRBS). Because of the larger birefringence effect induced by the pump light in the longer wavelength range, upconversion shows better performance than downconversion. Compared with the noninverted case, inverted wavelength conversion shows better performance due to the positive contribution from cross gain modulation (XGM), which takes place simultaneously with XPolM.

show abstract

Nonlinearities in Active Media

Cited by 17 publications

References 159 publications

Nonlinear carrier dynamics in a quantum dash optical amplifier

Nonlinear carrier dynamics in a quantum dash optical amplifier

SOA-based all-optical switch with subpicosecond full recovery

Signal-induced birefringence and dichroism in a tensile-strained bulk semiconductor optical amplifier and its application to wavelength conversion

Contact Info

Product

Resources

About