All-optical wavelength conversion by EAM with shifted bandpass filter for high bit-rate networks

In the modern intelligent fiber Bragg grating (FBG) sensing network, the spectrum interrogation should not only have high speed and wavelength resolution, but also use the limited spectrum resource efficiently. In this paper, we propose a spectrum interrogation technique by using a wavelength-division multiplexing (WDM) to optical time-division multiplexing (OTDM) converter, which could map the sensing signals from the wavelength domain to the time domain quickly and efficiently. The converter consists of an electro-optic switch, time delay unit and a multi-wavelength converter. The continuous WDM sensing signals are converted into pulsed WDM signals by using a 10 GHz LiNbO 3 intensity modulator as the electro-optic switch. A segment of single mode fiber (SMF) is used as the time delay unit for delaying the pulsed WDM signals overlapped in time. By using a high speed 40 GHz electro-absorption modulator (EAM) as the multi-wavelength converter, the pulsed and delayed WDM signals are converted into OTDM signals with the same wavelength. At last, the light signals after demodulation are detected by photoelectric detector (PD) which has high response speed and low cost. The mapping of the wavelength domain to the time domain in our spectrum interrogation can allocate the spectrum resource efficiently and dynamically. It is experimentally demonstrated that two signals in wavelength domain can be converted into time domain signals carried by a wavelength with a roughly equal conversion efficiency. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/24/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx E1GU obp 2mrfc nuiT wnm oaV DCV

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“…Since the EAM is inherently polarization independent, the wavelength converter is insensitive to the input signal polarization. [10][11][12][13] …”

Section: Principlesmentioning

confidence: 99%

An efficient WDM-OTDM converter for spectrum interrogation based on nonlinear effects in electro-absorption modulator

et al. 2013

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“…Several ideas have been suggested for reducing the patterning. The idea of utilizing the ultrafast chirp dynamics in the semiconductors to process high speed optical signals by using a detuned optical bandpass filter (OBF) after an SOA [1] or an EAM [2] have been realized and reported recently. A simple but effective scheme called the "turbo-switch" with two cascaded SOAs has also been presented [3].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of patterning effect in wavelength conversion by cascaded semiconductor optical amplifier and electroabsorption modulator

Zhou

Zhang

Öhman

et al. 2008

Optical Transmission, Switching, and Subsystems VI

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A scheme for mitigating patterning effects in wavelength conversion by using a concatenated semiconductor optical amplifier (SOA) and electroabsorption modulator (EAM) is proposed. The scheme is investigated theoretically and experimentally. The bit error ratio and the power penalty of the converted output signal are estimated and compared with the results of wavelength conversion based on cross gain modulation in a single SOA.

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“…exploited in nonlinear fibers [4] [5] , holey fibers [6] [7] , or periodically poled LiNbO 3 materials [8] [9] , and non-parametric nonlinear material processes as e.g. found in semiconductor materials such as lasers [10] [11] , electroabsorption modulators(EAM) [12] [13] , or semiconductor optical amplifiers (SOAs) [ [20] . The former processes are ultra-fast and show relaxation times below 1 ps.…”

Section: Introductionmentioning

confidence: 99%

All-optical wavelength conversion based on cascaded effect of cross-gain modulation and cross-phase modulation in SOAs

Huang

Weng

et al. 2007

SPIE Proceedings

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All-optical wavelength conversion plays a major role in providing the wavelength flexibility in optical communication networks. All-optical wavelength converters (AOWCs) based on cross-gain modulation (XGM) and cross-phase modulation (XPM) in semiconductor optical amplifiers (SOAs) have attracted considerable research interest. In this paper, we propose a novel scheme for cascaded wavelength conversion based on cross-gain modulation and cross-phase modulation in SOAs. The wavelength conversion operation in the proposed scheme includes two stages, that is, XGM in the first stage followed by the stage of XPM, and thus is expected to have a high ER and a large input power dynamic range simultaneously.

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All-optical wavelength conversion by EAM with shifted bandpass filter for high bit-rate networks

Cited by 7 publications

References 9 publications

An efficient WDM-OTDM converter for spectrum interrogation based on nonlinear effects in electro-absorption modulator

An efficient WDM-OTDM converter for spectrum interrogation based on nonlinear effects in electro-absorption modulator

Mitigation of patterning effect in wavelength conversion by cascaded semiconductor optical amplifier and electroabsorption modulator

All-optical wavelength conversion based on cascaded effect of cross-gain modulation and cross-phase modulation in SOAs

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