Two mode amplitude-stable intracavity-doubled laser and method

Details Two mode amplitude-stable intracavity-doubled laser and method Two mode amplitude-stable intracavity-doubled laser and method

1997-09-05

1999-09-28

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Nonlinear device

372 21, H01S 310

Patent

active

059600152

ABSTRACT:
A two-mode, amplitude-stable laser is disclosed which provides two-mode operation (i.e., two fundamental lasing modes of similar, but distinct frequencies), resulting in low noise output at harmonic frequencies of the fundamental mode frequencies. An associated method is also disclosed. A nonlinear material is positioned in the path of lasing light for converting light from fundamental frequencies to particular harmonic frequencies of those fundamental frequencies such that the fundamental frequencies incur a nonlinear loss. The nonlinear material establishes the nonlinear loss at a level which is greater than the linear loss within the cavity such that two of the fundamental frequencies lase while unwanted fundamental frequencies are extinguished. A two-mode criterion is introduced which ensures two-mode laser operation. A stability criterion is also introduced which cooperates with the two-mode criterion in a way which provides a high level of beam output intensity stability.

REFERENCES:
patent: 5164947 (1992-11-01), Lukas et al.
patent: 5446749 (1995-08-01), Nighan, Jr. et al.
M.J.F. Digonnet and C.J. Gaeta, Theoretical analysis of optical fiber laser amplifiers and oscillators, Feb. 1, 1985, Applied Optics.
G.D. Boyd and D.A. Kleinman, Parametric Interaction of Focused Gaussian Light Beams, Jul. 1968, Journal of Applied Physics.
Michio Oka and Shigeo Kubota, Stable intracvity doubling of orthogonal linearly polarized modes in diode-pumped Nd: YAG lasers, Oct. 1988, Otpics Letters.

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