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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: 2007-08-01
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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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1. As shown in Fig. 3, the light emitted by the pump source 6 is incident on the gain medium 5 placed in the "8" shaped resonator through the shaping and focusing system. The center wavelength of the light emitted by the pump source 6 and the gain medium The absorption bands of 5 coincide. The resonant cavity is composed of two plane mirrors 10, 11 and two concave mirrors 12, 13. The plane mirror 11 has a transmittance of 4% for the oscillating laser. The two concave mirrors 12, 13 totally reflect the wavelength of the oscillating laser. The plane mirror 10 simultaneously It satisfies the anti-reflection of the pump light and the total reflection of the oscillating laser. Gain medium 5 uses anisotropic crystals, such as Nd:YVO 4 , Nd: YAP, Ti: Sapphire, etc., an oblique angle of 1° is formed between the two transparent surfaces (eliminating the etalon effect). The optical unidirectional device composed of the Faraday rotator 7 and the half-wave plate 8 in the cav...

Embodiment 2

[0035] Example 2. As shown in Figure 4, the pump source 6 placed in the condenser cavity pumps the gain medium 5 placed in the condenser cavity. The gain medium 5 is placed in the optical path of the three-mirror ring resonator. The resonant cavity consists of two Two flat mirrors 10, 11 and a concave mirror 12 are formed together. The flat mirror 10 and the concave mirror 12 are coated with oscillating laser total reflection and pump light anti-reflection film. The flat mirror 11 is an output mirror and is coated with an oscillating laser fixed-point reflection film. Gain medium 5 uses anisotropic crystals, such as Nd:YVO 4 , Nd: YAP, Ti: Sapphire, etc., its two transparent surfaces should be at a certain angle (eliminate the etalon effect). The optical unidirectional device composed of the Faraday rotator 7 and the half-wave plate 8 in the cavity makes the laser operate at a single frequency. The first electro-optic crystal 1 covered with the electrode 3 is placed between the fl...

Embodiment 3

[0036] Embodiment 3. As shown in Fig. 5, 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 and focusing system. The center wavelength of the light emitted by the pump source 6 and the gain medium 5 The absorption bands coincide. The resonant cavity is composed of two flat mirrors 10, 11, 14, 15 and two concave mirrors 12, 13. The flat 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 the output mirror , Coated with oscillating laser fixed-point reflective film. The gain medium 5 can use isotropic crystals, such as Nd:YAG, He-Ne gas, etc. Its two light-passing surfaces should be at a certain angle (eliminate the etalon effect). The Brewster window 9 is used as a polarizer, and the optical unidirectional device composed of the Faraday rotator 7 and the half-wave plate 8 in the cavity makes the laser operate at a sin...

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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 a tuning device. Background technique [0002] Single-frequency tunable laser is an important light source. It has broad application prospects in the fields of remote sensing, missile tracking, optical fiber communication, high-density optical storage, etc., and has attracted widespread attention. [0003] Prior to this, the relevant research work included: [0004] 1. P.A.Schulz et al. published a paper titled "Frequency Modulated Nd:YAG Laser" on Opt.Lett in 1991. This work uses LiTaO 3 As a modulation crystal, a continuous tunable laser with a maximum tuning range of 12GHz is obtained. The time for the laser frequency to be tuned to 1.2GHz is 0.6ns, and the output power is 20mW. [0005] 2. J. Harrison et al. published in the IEEE Journal of Quantum Electronics in 1992 that a single-frequency laser tuned with etalon and piezoele...

Claims

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Application Information

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