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Browse Journals & Magazines > Photonics Technology Letters, ...> Volume:15 Issue:10 Help

Extinction ratio improvement by strong external light injection and SPM in an SOA for OTDM pulse source using a DBR laser diode

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3 Author(s)
Hu, Zhaoyang ; Dept. of Electr. & Comput. Eng., Univ. of California, Santa Barbara, CA, USA ; Davanco, M. ; Blumenthal, D.J.

We demonstrate above 6-dB extinction ratio (ER) improvement by strong external light injection for 20-GHz optical pulses generated from a gain-switched high-speed distributed Bragg reflector (DBR) laser diode. The pulses also exhibit a reduced chirp accompanied with a reduced total root-mean square noise. Above 12-dB pulse ER improvement was further obtained with self-phase modulation (SPM) effect in a semiconductor optical amplifier (SOA) followed by an optical bandpass filter. Stable 40-GHz pulses were demonstrated through passively multiplexing the pulses with 6-ps pulsewidth.

Published in:
Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 10 )

Date of Publication: Oct. 2003

Page(s):
1419 - 1421
ISSN :
1041-1135
INSPEC Accession Number:
7746564
Digital Object Identifier :
10.1109/LPT.2003.818258
Product Type:
Journals & Magazines
Date of Current Version :
23 September 2003
Issue Date :
Oct. 2003
Sponsored by :
IEEE Photonics Society

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