Experimental analysis of cross-phase modulation and cross-gain modulation in SOA-injecting CW assist light

Inohara, Ryo; Nishimura, K.; Tsurusawa, M.; Usami, M.

doi:10.1109/lpt.2003.816121

Cited by 54 publications

(16 citation statements)

References 7 publications

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“…Traces 4a and 4b are for the SOA-MZI output without and with the shaping signal being injected, respectively. For the latter, the combined effect of XGM and XPM can be seen [20]. A slight asymmetry in the biasing currents was observed to provide a better extinction ratio for the spectral filtering.…”

Section: Resultsmentioning

confidence: 90%

“…Therefore it could be employed to dynamically change the radiation bandwidth by increasing or reducing the accumulated dispersion. The SOA dynamics could also be controlled through its bias current or by adding a low wavelength component which would change the response time of the SOA and therefore the selected bands' bandwidth [20].…”

Section: Resultsmentioning

confidence: 99%

“…An optical waveform used to control the shaping of the previous pulse counter-propagates through the upper SOA. Assuming that the shaping waveform is a single optical pulse with a duration much shorter than the recovery time of SOA 1 , rec τ , and that the gain response of SOA 1 follows a negative exponential as in [20], the electrical fields at the output of the SOAs are given by In the initial state, t<0, no external pulse is injected into the system. Assuming identical SOAs, when the same biasing currents bias I are applied to both devices .…”

Section: Principle Of Operationmentioning

confidence: 99%

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Terahertz radiation shaping based on optical spectrum modulation in the time domain

Palací¹,

Bockelt²,

Vidal³

2012

Opt. Express

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A terahertz shaping system based on optical fiber components as opposed to traditional free-space solutions is proposed. It is based on the time-domain modulation of the optical source spectrum. Standard singlemode fiber distributes and disperses the pulse before filtering its spectral components by means of the cross-gain and cross-phase modulation effects taking place in an interferometric semiconductor optical amplifier structure. Experimental measurements are obtained, showing the tunability of the system as well as its reconfigurability.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Principle Of Operationmentioning

confidence: 99%

See 1 more Smart Citation

Terahertz radiation shaping based on optical spectrum modulation in the time domain

Palací¹,

Bockelt²,

Vidal³

2012

Opt. Express

View full text Add to dashboard Cite

show abstract

“…By referring to the results, in order to increase the capacity and make full use of the system the sequence of the inverter data from converted channels should change before sending it simultaneously to each user, possibly using polarizationdiscriminating delay interferometer (PI-DI) presented in International Journal of Optics [ [32][33][34]. The scheme can be employed for the pump power of 3 dBm to provide 1 to 2 XGM-WC with 1 : 64 splitting ratio at 20 km.…”

Section: The Impact Of Splitting Ratiomentioning

confidence: 99%

Optical Channel Capacity Upgrade Based on Multiwavelength Conversion XGM Using Semiconductor Optical Amplifier for Access Networks

Ab-Rahman¹,

Swedan

2017

International Journal of Optics

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This paper demonstrates a 10 Gb/s one-to-two-wavelength conversion configuration based on cross-gain modulation for optical access networks using a single TW-SOA. The method is capable of converting a signal data of specific wavelength 1541 nm to certain wavelengths of CW's laser 1554 nm and 1558 nm with 4 nm spacing. The pump power level was classified due to channel response. A result obtained was the best power level offering wavelength converter between −6 and 3 dBm. The conversion efficiency achievement provided an acceptable result for probe signals. The findings of -factor performance were investigated. The values were found to be more than 9 for point to point transmission and 20 km fiber configurations for the original and converted signal. The technique implemented at 20 km and the power of all channels were adequate to provide a splitting ratio of 1/64 for the launched pump power 3 dBm.

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“…[16,17] To evaluate XPM, a simple analysis technique utilizing a polarization discriminating delayed interferometer (PD-DI) was employed, which was originally proposed as a wavelength converter named "delayed interference signal-wavelength converter (DISC)" in [18]. Phase change by XPM and gain suppression by XGM can be individually estimated using this technique.…”

Section: Measurement Proceduresmentioning

confidence: 99%

Optical nonlinearities in semiconductor optical amplifier and electro-absorption modulator: their applications to all-optical regeneration

Usami

Nishimura

2005

J Optic Comm Rep

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Semiconductors have large optical nonlinearity with response speed in the several tens of picosecond range, making them ideal use as all-optical regenerators and wavelength converters. We theoretically and experimentally investigated optical nonlinearities induced by carrier dynamics both in forward biased semiconductor waveguide (SOA) and in reverse biased semiconductor waveguide (EAM). We made a detailed theoretical study of carrier dynamics in semiconductor waveguides by using the newly developed time-dependent transfer matrix method. To confirm the simulation results, we propose utilizing a polarization discriminating delayed interferometer (PD-DI) configuration as a simple technique for measuring optical nonlinearities such as cross gain modulation (XGM), cross absorption modulation (XAM), and cross phase modulation (XPM). In the first part of the paper, we reviewed SOA-based regenerators. As expected from the simulation results, we confirmed that injection of the transparent assist light was very effective in reducing of the SOA gain recovery time of down to a few tens of picoseconds. We further demonstrated 40 Gbit/s regeneration using an SOA-one-arm MZI (so-called UNI) configuration. The superior regeneration capability of two-stage UNI was successfully confirmed by a recirculating loop experiment up to 30,000 km with 150 regenerations. In the latter part of the paper, we reviewed all-optical regenerators using EAM. A bit-synchronized rf-driven XAM 3R regenerator consisting of only one EAM for both gating and timing correction was demonstrated at 20 Gbit/s. An EAM in conjunction with delayed interferometer configuration, which utilizes XPM as well as XAM in the EAM, has structurral simplicity and fast regeneration operability up to 100 Gbit/s. The fast response of EAM allows the optical regeneration with a small pattern word effect. 498Masashi Usami and Kohsuke Nishimura

show abstract

Experimental analysis of cross-phase modulation and cross-gain modulation in SOA-injecting CW assist light

Cited by 54 publications

References 7 publications

Terahertz radiation shaping based on optical spectrum modulation in the time domain

Terahertz radiation shaping based on optical spectrum modulation in the time domain

Optical Channel Capacity Upgrade Based on Multiwavelength Conversion XGM Using Semiconductor Optical Amplifier for Access Networks

Optical nonlinearities in semiconductor optical amplifier and electro-absorption modulator: their applications to all-optical regeneration

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