Injection locking-based pump recovery for phase-sensitive amplified links

Samuel L.I. Olsson, Bill Corcoran, Carl Lundström, Ekawit Tipsuwannakul, Stylianos Sygletos, Andrew D. Ellis, Zhi Tong, Magnus Karlsson, Peter A. Andrekson

Research output: Contribution to journalArticlepeer-review


An injection locking-based pump recovery system for phase-sensitive amplified links, capable of handling 40 dB effective span loss, is demonstrated. Measurements with 10 GBd DQPSK signals show penalty-free recovery of a pump wave, phase modulated with two sinusoidal RF-tones at 0.1 GHz and 0.3 GHz, with 64 dB amplification. The operating power limit for the pump recovery system is experimentally investigated and is governed by the noise transfer and phase modulation transfer characteristics of the injection-locked laser. The corresponding link penalties are explained and quantified. This system enables, for the first time, WDM compatible phase-sensitive amplified links over significant lengths.
Original languageEnglish
Pages (from-to)14512-14529
Number of pages18
JournalOptics Express
Issue number12
Publication statusPublished - 11 Jun 2013


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