期刊
APPLIED OPTICS
卷 56, 期 8, 页码 2260-2264出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.56.002260
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资金
- National Key Scientific Instrument Project [2012YQ150092]
- National Natural Science Foundation of China (NSFC) [11374370, 11404211, 11434005]
- Science and Technology Commission of Shanghai Municipality (STCSM) [13ZR1458100]
We report on the experimental implementation of single-frequency fiber-laser pumped mid-infrared (mid-IR) transmitter and receiver modules for free-space communications. These modules enable frequency upconversion and downconversion between the 1550-nm telecom wavelength and the mid-IR, thus providing essential free-space transmission links with mid-IR single-frequency lasers in the 3.6 mu m region. Specifically, based on difference frequency generation (DFG) in MgO-doped periodically poled LiNbO3 (MgO: PPLN), the mid-IR transmitter produces 9.3-mW power at 3594 nm with 5-W pump power at 1083 nm (< 10 kHz linewidth) and 3-W signal power at 1550 nm (< 10 kHz linewidth), and the mid-IR receiver reproduces 12-mu W power at 1550 nm with 4.7-W pump power at 1083 nm and 5-mW laser at 3594 nm. The whole modules are integrated into portable and compact devices by incorporating single-frequency fiber lasers, fiber amplifiers, DFG units, and related electronic circuits. In addition, the uses of all polarization-maintaining fiber configuration and wellcontrolled heat dissipation make the mid-IR transmitter and receiver exhibit a long-term stability. (C) 2017 Optical Society of America
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