Single frequency tuneable laser

A technology for tuning lasers and single frequency, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of inability to obtain fast frequency tuning, reduced laser reliability, different tuning sensitivity, etc., to improve reliability and Repeatability, overcoming tuning speed bottlenecks, effect of high tuning accuracy

Inactive Publication Date: 2006-05-10
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the etalon needs to be installed on an adjustable base, which not only reduces the reliability of the laser, but also easily causes resonant cavity detuning; usually, the displacement of piezoelectric ceramics does not have a linear relationship with the applied voltage. Under different voltages, tuning The sensitivity is different; both have mechanical movement during the adjustment process, and the inherent inertia makes this method unable to obtain fast frequency tuning, and the tuning time used is on the order of milliseconds

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] Example 1. As image 3 As shown, the light emitted by the pump source 6 is incident on the gain medium 5 placed in the "8"-shaped resonant cavity through the shaping focusing system, and the central wavelength of the light emitted by the pump source 6 coincides with the absorption band of the gain medium 5 . The resonant cavity is composed of two plane mirrors 10, 11 and two concave mirrors 12, 13. The transmittance of the plane mirror 11 to the oscillating laser is 4%, and the two concave mirrors 12, 13 fully reflect the light of the oscillation laser wavelength. Satisfy anti-reflection for pump light and total reflection for oscillating laser. Gain medium 5 uses anisotropic crystals, such as Nd:YVO 4 , Nd:YAP, Ti:Sapphire, etc., an oblique angle of 1° between the two light-transmitting surfaces (to eliminate the etalon effect). The optical one-way device composed of the Faraday rotator 7 and the half-wave plate 8 in the cavity enables the laser to operate at a singl...

Embodiment 2

[0035] Example 2. If Figure 4 As shown, the pump source 6 placed in the light-condensing cavity pumps the gain medium 5 placed in the light-condensing cavity, and the gain medium 5 is placed in the optical path of the three-mirror ring resonant cavity. The resonant cavity consists of two plane mirrors 10, 11 and a Concave mirror 12 constitutes together, plane mirror 10 and concave mirror 12 are coated with oscillating laser total reflection, pump light anti-reflection coating, plane mirror 11 is an output mirror, is coated with oscillating laser fixed-point reflection film. Gain medium 5 uses anisotropic crystals, such as Nd:YVO 4 , Nd:YAP, Ti:Sapphire, etc., its two light-transmitting surfaces should form a certain angle (to eliminate the etalon effect). The optical one-way device composed of the Faraday rotator 7 and the half-wave plate 8 in the cavity enables the laser to operate at a single frequency. An electro-optic crystal 1 whose surface is covered with electrodes 3...

Embodiment 3

[0036] Example 3. As Figure 5 As shown, the light emitted by the pump source 6 is incident on the gain medium 5 placed in the six-mirror ring resonator through the shaping focusing system, and the central wavelength of the light emitted by the pump source 6 coincides with the absorption band of the gain medium 5 . The resonant cavity is composed of two plane mirrors 10, 11, 14, 15 and two concave mirrors 12, 13. The plane mirrors 10, 11, 14, 15 and the concave mirror 12 are coated with an oscillating laser total reflection film, and the concave mirror 13 is an output mirror. , Coated with oscillating laser fixed-point reflection film. Gain medium 5 can use isotropic crystals, such as Nd:YAG, He—Ne gas, etc. Its two light-transmitting surfaces should form a certain angle (to eliminate the etalon effect). The Brewster window 9 is used as a polarizer, and the optical one-way device composed of the Faraday rotator 7 and the half-wave plate 8 in the cavity enables the laser to op...

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Abstract

This invention relates to single frequency attuning laser, which comprises laser gaining medium, laser resonance chamber, pump source, laser single frequency operation device and laser resonance device and is characterized by the following: the said laser resonance device is composed of one super standard electricity crystal and other micro resonance long electricity crystal. The electrical crystal relative two sides are covered electrode. This invention uses two blocks crystal with wide range, non-continuous adjusting laser frequency and takes place of mechanic adjusting and uses optical element to take place active optical elements.

Description

technical field [0001] The invention relates to a tunable laser, in particular to a single-frequency tunable laser using two electro-optic crystals as tuning devices. Background technique [0002] Single-frequency tunable laser is an important light source. It has broad application prospects in remote sensing, missile tracking, optical fiber communication, high-density optical storage and other fields, and has attracted widespread attention. [0003] Related research work before this includes: [0004] 1.P.A.Schulz et al. published a paper entitled "Frequency Modulated Nd:YAG Laser" on Opt.Lett in 1991. The work used LiTaO 3 As a modulation crystal, a continuously tunable laser with a maximum tuning range of 12GHz is obtained. The laser frequency tuning time of 1.2GHz is 0.6ns, and the output power is 20mW. [0005] 2.J.Harrison et al. published a single-frequency laser tuned with etalon and piezoelectric ceramics in the IEEE Journal of Quantum Electronics in 1992, and use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/107H01S3/09H01S3/14
Inventor 郑耀辉张宽收顾世杰李凤琴彭堃墀
Owner SHANXI UNIV
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