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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 4457–4468

Compromised extinction and signal-to-noise ratios of weak-resonant-cavity laser diode transmitter injected by channelized and amplitude squeezed spontaneous-emission

Yi-Hung Lin, Gong-Cheng Lin, Hai-Lin Wang, Yu-Chieh Chi, and Gong-Ru Lin  »View Author Affiliations


Optics Express, Vol. 18, Issue 5, pp. 4457-4468 (2010)
http://dx.doi.org/10.1364/OE.18.004457


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Abstract

By using a 200GHz AWG channelized ASE source in connection with a saturable semiconductor optical amplifier (SOA) based noise blocker as the injecting source at the remote node in front of the local optical network units (ONUs), we demonstrate the spectrum-sliced ASE transmitter with greatly suppressed intensity noise performance in WDM-PON network. Such channelized SOA filtering technique effectively reduces the relative intensity noise of the ASE source by at least 4.5 dB. The low-noise WRC-FPLD transmitter improves its extinction-ratio (ER) from 8.9 to 9.6 dB and signal-to-noise ratio (SNR) from 5.9 to 6.3 dB. In comparison with broad-band ASE injection-locked WRC-FPLD transmitter at same power, there is an improvement on receiving power penalty (ΔPReceiver) by 2 dB at BER 10−9 in back-to-back case, and the receiving power of BER 10−9 can achieve −24 dBm even after 25km fiber transmission. With additional AWG filtering, the intraband crosstalk effect between the upstream transmitted data and the reflected ASE signal is significantly reduced by 6.3dB. The compromised effects of ER and SNR on BER performance are also elucidated via the modified SNR model for the WRC-FPLD under ASE injection induced gain-saturation condition. The ΔPReceiver/ΔSNR of 8.89 at same ER condition is more pronounced than the ΔPReceiver/ΔER of 3.17 obtained under same SNR condition, indicating that the SNR plays a more important role than the ER on enhancing the BER performance.

© 2010 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(140.3520) Lasers and laser optics : Lasers, injection-locked
(250.5980) Optoelectronics : Semiconductor optical amplifiers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 18, 2009
Revised Manuscript: September 3, 2009
Manuscript Accepted: September 18, 2009
Published: February 19, 2010

Citation
Yi-Hung Lin, Gong-Cheng Lin, Hai-Lin Wang, Yu-Chieh Chi, and Gong-Ru Lin, "Compromised extinction and signal-to-noise ratios of weak-resonant-cavity laser diode transmitter injected by channelized and amplitude squeezed spontaneous-emission," Opt. Express 18, 4457-4468 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-5-4457


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