Generation of coherent terahertz radiation by photomixing of dual-mode lasers |
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Authors: | Tani Masahiko Gu Ping Hyodo Masaharu Sakai Kiyomi Hidaka Takehiko |
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Institution: | (1) Kansai Advanced Research Center, Communications Research Laboratory, The Ministry of Posts and Telecommunications, Japan, Iwaoka 588-2, Kobe, 651-2401, Japan;(2) Department of Electric Engineering Shonan Institute of Technology, 1-1-25 Tsujido-Nishikaigan, Fujisawa, Kanagawa, 251, Japan |
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Abstract: | We have reviewed and discussed the generation of continuous-wave terahertz radiation by the photomixing of dual-mode lasers, which includes a multi-mode laser diode (LD), a dual-mode microchip laser, a monolithic dual-mode DBR LD, and a widely tunable dual-mode external cavity LD. It is demonstrated by several experiments that the beat frequency of a dual-mode laser is more stable than the original laser modes because of the common-mode rejection effect. We also suggest a novel scheme by which the optical beat is stabilized to less than 1 kHz and its frequency can be precisely determined as well. |
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Keywords: | dual-mode lasers LTG-GaAs photomixing terahertz radiation |
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