Tunable laser for outputting non-polarized light

A technology for tuning lasers and non-polarized light, which is applied to lasers, laser components, semiconductor lasers, etc., can solve the problems of large size of tunable lasers, difficulty in achieving narrow-band output, and susceptibility to mechanical vibrations, etc., to achieve a large free spectral range , to meet the effect of small size, easy installation and production

Inactive Publication Date: 2012-12-12
GP PHOTONICS INC
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Problems solved by technology

The existing problems are: since a precision stepping motor is required to drive the grating for scanning, the tunable laser using this technology is relatively large in s

Method used

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  • Tunable laser for outputting non-polarized light
  • Tunable laser for outputting non-polarized light
  • Tunable laser for outputting non-polarized light

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Embodiment Construction

[0038] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] figure 1 A schematic diagram of a common Fabry-Perot optical etalon 100 is given. The material of the Fabry-Perot optical etalon 100 generally adopts optical glass such as fused silica or BK7 in the near-infrared and visible light bands. Assuming that the refractive index of the material is n, the two light-transmitting surfaces 2 and 4 are all coated with high The reflective film, whose reflectivity is R, has a thickness of h, and light is incident at an incident angle close to zero, can only pass through the etalon if it satisfies 2nh=mλ, where m is the order of the transmitted light. Free Spectral Range FSR of Optical Etalon 100 1 Can be expressed as: Δλ=λ 2 / (2nh), or expressed in frequency: Δv=c / (2nh), where c is the speed of light. The peak frequency of transmitted light can be expressed as: v=mc / (2nh), where m is the interfere...

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Abstract

The invention relates to a tunable laser for outputting non-polarized light. The tunable laser is mainly and technically characterized by comprising a first reflection mirror, a broadband laser gain medium, a tunable Fabry-Perot filter, a tunable acousto-optic filter, a second reflection mirror, a third reflection mirror and a laser control circuit, wherein a broadband light beam sent from the broadband laser gain medium can be filtered by the tunable Fabry-Perot filter and then is filtered by the tunable acousto-optic filter; a first-grade diffraction light beam is divided into two beams of polarized light with vertical polarized states; and a zero-grade diffraction light beam of the tunable acousto-optic filter is taken as an output light beam of the laser device. According to the tunable laser disclosed by the invention, continuous, the continuous, rapid and precise tuning can be performed on the output light of the laser in a wide spectral range; and the tunable laser has the characteristics of absence of mechanical movement parts, high electronic tuning speed, stable and reliable performance, small size, easiness in production and the like, and can be widely applied to the fields of lasers, optical tests, optical fiber communication, biological and medical instruments, optical fiber sensor networks and the like.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, in particular to a tunable laser with non-polarized light output. Background technique [0002] Because the grating has high spectral resolution in a large spectral range, it is widely used in various tunable lasers. The existing problems are: since a precision stepping motor is required to drive the grating for scanning, the tunable laser using this technology is relatively large in size, easily affected by mechanical vibration, and expensive. [0003] The traditional optical Fabry-Perot etalon is a filter device made by the principle of multi-beam interference. There are two main types: one is air-spaced, and the other is optical glass-spaced. Through the multi-beam interference effect of the Fabry-Perot cavity formed by the high reflectivity of the multi-layer dielectric film on the two light-passing surfaces, the multi-wavelength narrow-band filter output in a wide spectrum range can...

Claims

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Application Information

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IPC IPC(8): H01S3/107H01S3/081
CPCG02F1/116G02F1/139H01S3/1065H01S3/1068H01S5/142
Inventor 高培良
Owner GP PHOTONICS INC
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