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Development of short‐wavelength far‐infrared lasers and measurement of optical constants

A powerful short‐wavelength far‐infrared (FIR) laser from 40µm to 100µm in wavelength is required for the optical source of diagnostics of high‐density and large‐volume plasmas, and a production of γ‐rays by inverse Compton scattering. In order to design the optical system, we have measured the optical constants (refractive index and absorption coefficient) of crystal quartz, CVD‐diamond, and silicon for the short‐wavelength FIR lasers. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 153(3): 1–8, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20082