Semi-monolithic ring cavity for second harmonic generation of la

Details Semi-monolithic ring cavity for second harmonic generation of la Semi-monolithic ring cavity for second harmonic generation of la

1997-07-01

1999-02-09

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Nonlinear device

372 28, 372 93, 372 99, 372 98, H01S 310

Patent

active

058704167

ABSTRACT:
A semi-monolithic ring cavity for a second harmonic generation of laser frequency including a nonlinear crystal, an input mirror, an output mirror, a first point, at which a fundamental wave is incident onto the input mirror, a second point, at which the fundamental wave is incident onto the output mirror along with a second harmonic wave, and a third point, at which the fundamental wave reflects totally from a side surface of the nonlinear crystal. One of the input and output mirrors is coated with a dielectric and separated from the nonlinear crystal whereas the other mirror is formed on the nonlinear crystal. The fundamental wave forms a ring cavity in such a manner that the second harmonic wave is generated only along an axis extending through the first and second points. The semi-monolithic ring cavity exhibits a stable frequency characteristic and a high transform efficiency when a second-harmonic generation of continuous-wave laser frequency is carried out. Accordingly, the semi-monolithic ring cavity is expected to provide desired effects in a variety of technical fields. Using the high frequency tuning characteristic of the semi-monolithic ring cavity, it is also possible to develop an optical frequency standard exhibiting a frequency stability higher than those of conventional optical frequency standards.

REFERENCES:
patent: 4764933 (1988-08-01), Kozlovsky et al.
patent: 5027361 (1991-06-01), Kovlovsky et al.
patent: 5231643 (1993-07-01), Naya et al.

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