In situ and self-restorable injection-locking monitor by integrated photodiode for FPLD WDM transmitter

Gong Ru Lin*, Yu Sheng Liao, Hao-Chung Kuo

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A novel in situ self-restoration scheme to track real time the injection locking of a Fabry-Perot laser diode (FPLD) is demonstrated by a built-in integrated monitor photodiode (MPD). The variation in the received photocurrent of the integrated MPD was calculated by a microcontroller unit integrated with an analog-to-digital converter, which is employed to dynamically control the temperature of the FPLD via a thermal-electrical controller for wavelength stabilization. Such a scheme can be effectively implemented with a minimum amount of redundant network resources to achieve self-restoration within 50 s with Q factor >8.2 and side-mode suppression ratio >35 dB at 2.5 Gbit/s. The feasibility of the proposed self-restorable locker is suitable for most wavelength-locking FPLDs within high-speed wavelength-division multiplexing networks.

Original languageEnglish
Article number5676401
Pages (from-to)76-83
Number of pages8
JournalIEEE Journal of Quantum Electronics
Volume47
Issue number1
DOIs
StatePublished - 12 Jan 2011

Keywords

  • Auto restoration
  • Fabry-Perot laser diode
  • injection locking
  • monitored photodiode
  • real time

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