Low profile high performance wavelength tunable laser
A tunable laser, high-performance technology, applied in lasers, laser parts, semiconductor lasers, etc., can solve the problems of unstable wavelength locker performance, difficult installation of wavelength lockers, unstable laser oscillation, etc. Production, wavelength and power output stability
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[0062] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0063] figure 1 Incident light (κ) is shown i ), diffracted light (κ d ) and sound waves (κ s ) wave-vector relationship, κ i ±κ s =κ d This relationship always holds, and the use of the plus (+) or minus (-) sign is determined by the direction of propagation of the incident sound wave. For isotropic Bragg diffraction, κ i =κ d , n i =n d , θ i =θ d , Sinθ B =λ / 2nλ s =(λ / 2nυ s )f s , where n i and n d are the refractive indices of incident light and diffracted light, respectively, υ s is the speed of the sound wave, f s is the frequency of the sound wave. For anisotropic Bragg diffraction, θ i ≠θ d , it can be shown that the following relationship exists: Sinθ i +Sinθ d ≈(λ / 2nυ s )f s , and λ=±υ s (n d -n i ) / f s .
[0064] In a fixed system, the angle between the acousto-optic medium and the incident light is c...
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