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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

Inactive Publication Date: 2010-01-20
高培良
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Problems solved by technology

The main problems of existing tunable lasers designed with acousto-optic filters used in optical fiber communications are: (1) the laser oscillation in the Fabry-Perot cavity is unstable because the dispersion is not compensated; (2) the wavelength The structure of the locker makes installation very difficult and cannot be miniaturized; (3) The performance of the wavelength locker is unstable

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  • Low profile high performance wavelength tunable laser
  • Low profile high performance wavelength tunable laser
  • Low profile high performance wavelength tunable laser

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Embodiment Construction

[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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Abstract

The invention relates to a low profile high performance wavelength tunable laser, wherein the tunable laser resonance cavity uses a dispersion compensation acousto-opto tunable filter. Precision and stability of the output wavelength is determined by a wavelength locker. The wavelength locker uses two beams of isolated intra-cavity laser beams, so that use of a beam splitter is avoided. Comparingwith design of ordinary beam lockers, requirement to the space is lowered, the operation is more stabilized, and the assembling is easier. The acousto-opto tunable filter has a structure that two transducers in opposite directions are welded on the same crystal for generation of two acoustic waves transmitted in opposite directions. Chromatic dispersion generated by diffusing the collimated lightby a first acoustic wave can be compensated by a second acoustic wave in the opposite direction. By using different laser gain medium, acoustic driving frequency and acousto-opto crystals, the invention can be used for manufacturing tunable laser in wavelength ranges of various kinds of applications.

Description

technical field [0001] The invention relates to a tunable laser, in particular to a laser resonator using a dispersion-compensated acousto-optic tunable filter and a wavelength locker, which can realize a small high-performance wavelength tunable with fast tuning speed, stable wavelength and power output laser. Background technique [0002] At present, most modern telecommunication systems are based on optical fiber communication technology. Fiber optic networks offer unprecedented communication capacity and installation flexibility to support a wide variety of evolving broadband applications. Broadband tunable lasers can help maximize the use of existing fiber network resources. Dynamic tuning can shift information traffic from congested channels to unused channels to meet the demands of the Internet. Tunable lasers are also one of the key components for implementing dynamic fiber networks, where optical paths can be established or changed quickly and easily. [0003] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/32H01S5/04H01S5/065H01S5/10H01S5/06H01S5/0687
CPCH01S3/1392H01S3/082H01S3/1068H01S3/1303G02F1/116H01S5/141G02F1/332
Inventor 高培良
Owner 高培良
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