High-repetition-rate pulsed-pump fiber OPA for amplification of communication signals

• Published in: Journal of lightwave technology Vol. 24; no. 8; pp. 3021 - 3027
• Main Authors: Kalogerakis, G., Shimizu, K., Marhic, M.E., Wong, K.K.-Y., Uesaka, K., Kazovsky, L.G.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplification; Applied sciences; Bandwidth; Circuit properties; Coding, codes; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber nonlinear optics; Fiber optics; Fibers; Gain; Information, signal and communications theory; Integrated optics. Optical fibers and wave guides; Noise levels; Optical amplifier; Optical and optoelectronic circuits; Optical fiber amplifiers; Optical fiber communication; Optical fiber theory; Optical fibers; Optical filters; optical parametric amplifier (OPA); Optical pulses; Optical pumping; Pulse amplifiers; pulsed pump; pulsed reshape; Pumps; Signal and communications theory; Stimulated emission; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Integrated optics; pulsed reshape; Non linear material; Optical parametric amplifier; High repetition rate; Non linear optics; pulsed pump; Optical fiber amplifiers; Continuous wave; Optical filter; Simulation; NRZ code; Optical amplifier; Gain; optical parametric amplifier (OPA); Optical fiber; High rate transmission
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2006.878012

The use of a high-repetition-rate pulsed-pumped fiber optical parametric amplifier (OPA), followed by a narrow optical filter for transparent signal amplification, was proposed. Theory and simulations predict larger gain and gain bandwidth compared to a continuous-wave pump with the same average power. Experimentally, when using a pump with 0.63 W of average power in a 500-m-long highly nonlinear fiber, the gain increased from 19.7 to 29.2 dB, and the bandwidth increased when a CW pump was changed to one that is modulated by a 20-GHz cosine-squared function. Clear eye openings were demonstrated for the amplification of a 10-Gb/s NRZ signal, with a power penalty of 1.5 dB