title: Injection locking-based pump recovery for phase-sensitive amplified links.
abstract: 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.
authors.affiliation: Photonics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden. samuel.olsson@chalmers.se
authors.forename: Samuel L I
authors.initials: SL
authors.lastname: Olsson
authors.forename: Bill
authors.initials: B
authors.lastname: Corcoran
authors.forename: Carl
authors.initials: C
authors.lastname: Lundström
authors.forename: Ekawit
authors.initials: E
authors.lastname: Tipsuwannakul
authors.forename: Stylianos
authors.initials: S
authors.lastname: Sygletos
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Ellis
authors.forename: Zhi
authors.initials: Z
authors.lastname: Tong
authors.forename: Magnus
authors.initials: M
authors.lastname: Karlsson
authors.forename: Peter A
authors.initials: PA
authors.lastname: Andrekson
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State; D013685:Telecommunications / Q000295:instrumentation*