TY - JOUR
T1 - Laser transmitter for undersea communications using third-harmonic generation of fiber-laser system at 1.5 μm
AU - Polynkin, Pavel
AU - Roussev, Rostislav
AU - Fejer, M. M.
AU - Peyghambarian, N.
AU - Moloney, Jerome
N1 - Funding Information:
Manuscript received April 5, 2007; revised April 27, 2007. This work was supported by the U.S. Air Force Office of Scientific Research under Contract F49620-02-1-0380, Contract F49620-02-1-0240, and Contract F49620-01-1-0428. P. Polynkin and N. Peyghambarian are with the College of Optical Sciences, The University of Arizona, Tucson, AZ 85721 USA (e-mail: ppolynkin@optics. arizona.edu). R. Roussev and M. M. Fejer are with the Edward L. Ginzton Laboratory, Stanford University, Stanford, CA 94305 USA. J. Moloney is with the Arizona Center for Mathematical Sciences, The University of Arizona, Tucson, AZ 85721 USA. Digital Object Identifier 10.1109/LPT.2007.902709
PY - 2007/9/1
Y1 - 2007/9/1
N2 - We report a viable laser transmitter for free-space undersea communications. An all-fiber, picosecond, Watt-level master-oscillator-power-amplifier (MOPA) system at 1.5 μm based on rapid amplification of mode-locked pulses in heavily Er:Yb codoped phosphate fiber is combined with fiber pigtailed lithium niobate intensity modulator (pulse picker), to construct a fully integrated eye-safe transmitter operating at 65-Mb/s data rate, that can be used in intermediate-range (few kilometers) atmospheric communication links. For undersea use, the output of the MOPA system is frequency-tripled into the blue-green transparency window of ocean water. The wavelength conversion occurs in a simple single-pass setup utilizing a sequence of two periodically poled lithium niobate crystals, both of which are operated at room temperature. The conversion efficiency from fundamental to third harmonic reached 14% and resulted in generation of 140 mW of average power at 518 nm. The conversion efficiency can be straightforwardly increased threefold using properly antireflection-coated optics in the free-space part of the setup, and the data rate can be scaled up into the gigabit-per-second range by using a faster mode-locked oscillator in the MOPA system.
AB - We report a viable laser transmitter for free-space undersea communications. An all-fiber, picosecond, Watt-level master-oscillator-power-amplifier (MOPA) system at 1.5 μm based on rapid amplification of mode-locked pulses in heavily Er:Yb codoped phosphate fiber is combined with fiber pigtailed lithium niobate intensity modulator (pulse picker), to construct a fully integrated eye-safe transmitter operating at 65-Mb/s data rate, that can be used in intermediate-range (few kilometers) atmospheric communication links. For undersea use, the output of the MOPA system is frequency-tripled into the blue-green transparency window of ocean water. The wavelength conversion occurs in a simple single-pass setup utilizing a sequence of two periodically poled lithium niobate crystals, both of which are operated at room temperature. The conversion efficiency from fundamental to third harmonic reached 14% and resulted in generation of 140 mW of average power at 518 nm. The conversion efficiency can be straightforwardly increased threefold using properly antireflection-coated optics in the free-space part of the setup, and the data rate can be scaled up into the gigabit-per-second range by using a faster mode-locked oscillator in the MOPA system.
KW - Mode-locked fiber lasers
KW - Nonlinear wavelength conversion
KW - Optical undersea communications
KW - Periodically poled crystals
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U2 - 10.1109/LPT.2007.902709
DO - 10.1109/LPT.2007.902709
M3 - Article
AN - SCOPUS:34548189255
SN - 1041-1135
VL - 19
SP - 1328
EP - 1330
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 17
ER -