Tunable laser with double output light beams

A tuning laser, dual output technology, applied in the direction of lasers, laser components, semiconductor lasers, etc., can solve the problems of difficult implementation, poor ability to resist various mechanical vibrations, low tuning accuracy and output bandwidth, etc., to achieve easy installation And production, no mechanical moving parts, meet the effect of reliable operation

CN103762487AActive Publication Date: 2014-04-30GP PHOTONICS INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-04-30

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Abstract

The invention relates to a tunable laser with double output light beams. The first structure of the laser comprises a first laser cavity reflector, a laser gain medium, an intra-cavity collimating lens, an active optical phase modulator, a tunable acoustic-optic filter, a tunable Fabry-Perot filter, a second laser cavity reflector and a laser device controlling and driving system. A zero-level light beam which enters the tunable acoustic-optic filter after being reflected by the first laser cavity reflector forms the first laser output light beam and a zero-level light beam which enters the tunable acoustic-optic filter after being reflected by the second laser cavity reflector forms the second laser output light beam. According to the second structure of the laser, a Fabry-Perot etalon is added in the first structure, so that the purpose of further compressing the laser output frequency bandwidth is achieved. The tunable laser with the double output light beams has the advantages of being reasonable in design, free of mechanical movable part, stable and reliable in performance, low in cost, small in size, easy to install and produce and the like.
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Description

technical field

[0001] The invention belongs to the field of optoelectronics, in particular to an external cavity-type tunable laser with double output light beams which adopts a tunable Fabry-Perot filter of a liquid crystal optical phase modulator and a tunable acousto-optic filter. Background technique

[0002] In external-cavity broadband tunable lasers, the commonly used tuning techniques mainly include the following methods: 1. Tuning is carried out by driving the rotation of the grating through a precision stepping motor. The existing problems are reflected in: First, to achieve precise tuning of optical frequency , the stepping accuracy and repeatability requirements of the stepping motor are very high, so the manufacturing cost is relatively high; the second is that it is not easy to miniaturize due to the use of a stepping motor; the third is that the working stability in harsh working environments is relatively poor, In particular, the ability to resist various me...

Examples

Embodiment Construction

[0032] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] Tunable acousto-optic filters

[0034] figure 1 It is a structural diagram of an existing tunable acousto-optic filter. The tunable acousto-optic filter 100 includes a transducer 20 and an acousto-optic crystal 30; the radio frequency signal source 10 is connected to the transducer 20; the incident The light beam 2 is incident into the acousto-optic crystal 30 at the Bragg angle θB, generating a zero-order diffracted beam 3 and a first-order diffracted beam 4 .

[0035] The working principle of the acousto-optic filter is based on a phenomenon of Bragg diffraction. Bragg diffraction involves the interaction of photons (quanta of light energy) and phonons (quanta of sound energy). During this interaction, both energy and momentum are conserved. Momentum conservation requires κ d =κ i +κ s , where κ dis the momentum of the diff...