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Published June 1998 | public
Journal Article

Simultaneous Amplification of Terahertz Difference Frequencies by an Injection-Seeded Semiconductor Laser Amplifier at 850 nm

Abstract

Two-frequency operation of an 850 nm semiconductor optical amplifier was achieved by simultaneously injection seeding it with two diode lasers. The two frequencies could be independently amplified without strong interference when they were separated by more than 10 GHz, and the spectral purity was preserved by the amplification process. At frequency differences below 10 GHz, unbalanced two-frequency output was observed, which can be explained by a two-mode interaction driven by the refractive index modulation at the beat frequency. The laser system is suitable for the difference-frequency generation of coherent terahertz radiation in ultra-fast photoconductors or nonlinear optical media.

Additional Information

© 1998 Springer. Received March 27, 1998. We thank T. J. Crawford of Jet Propulsion Laboratory for his technical support. This work was supported by the National Aeronautics and Space Administration. G. A. Blake acknowledges additional support from the National Science Foundation.

Additional details

Created:
August 22, 2023
Modified:
October 19, 2023