All solid-state angular momentum tunable laser device with stable pulse energy

A technology for tuning lasers and stabilizing pulses, which is applied in the field of all-solid-state angular momentum tunable lasers, can solve the problems of large laser devices, complicated operations, fixed angular momentum, etc., and achieves the effects of compact structure, high pulse energy and simple operation.

Active Publication Date: 2012-09-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For lasers with angular momentum, the spot distribution is circularly symmetrical, which cannot be satisfied by common laser generation methods. At present, the generation can only be adjusted outside the cavity through technology such as a mode converter, which makes the laser device huge and complicated to operate. , is not suitable for simple adjustment and wide application, and the angular momentum generated is fixed, which cannot meet the current needs of tunable angular momentum in the field of quantum optics

Method used

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  • All solid-state angular momentum tunable laser device with stable pulse energy
  • All solid-state angular momentum tunable laser device with stable pulse energy
  • All solid-state angular momentum tunable laser device with stable pulse energy

Examples

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Effect test

Embodiment 1

[0036] Example 1: All-solid-state angular momentum tunable laser with stable pulse energy

[0037] Such as figure 1 As shown, it consists of a pump source 1, an optical coupling system 2, an input mirror 3, a solid laser medium 4, a saturable absorber 5 and an output mirror 6. The solid laser medium 4 is a Nd:YAG crystal, and its The two light-passing end faces are coated with an anti-reflection film with a light transmittance of more than 99% for pump light and 1064nm (oscillating light); the saturable absorber 5 is Cr:YAG, and the two light-passing end faces are not coated. The input mirror 3 is coated with a dielectric film with a transmittance greater than 90% for pump light and a reflectance greater than 99% for 1064nm; the surface of the output mirror 6 is coated with a dielectric film with a transmittance of 20% for 1064nm (oscillating light).

[0038] The doping concentration of neodymium in the Nd:YAG crystal is 0.5 at.%, and the Nd:YAG crystal is a cuboid with a len...

Embodiment 2

[0043] Example 2: All-solid-state angular momentum tunable laser with stable pulse energy

[0044] The structure is as described in Embodiment 1, and the difference from Embodiment 1 is that the input mirror 3 is replaced by a flat mirror, such as figure 2 As shown, the coating on the surface of the plane mirror is the same as that of the input mirror in Embodiment 1.

[0045] The solid laser medium 4 is Nd:YAG crystal, the doping concentration of neodymium is 1 at.%, and the Nd:YAG crystal is a cuboid with a length of 6 mm.

[0046] The saturable absorber 5 is Cr:YAG with a small signal transmittance of 87%, a diameter of 9.5mm, and a thickness of 2mm.

[0047] The input mirror 3 is a plane mirror, and the output mirror 6 is a plane mirror.

[0048] The pumping source 1 is an InGaAs semiconductor laser diode with an output wavelength of 808nm, its spot distribution is annular, and the pumping method is end pumping.

Embodiment 3

[0049] Example 3: All-solid-state angular momentum tunable laser with stable pulse energy

[0050] As described in Embodiment 1, the difference from Embodiment 1 is that the input mirror and the output mirror are omitted, and the structure is as follows image 3 As shown, instead of the input mirror and the output mirror, the incident surface 7 of the solid laser medium 4 is coated with a dielectric film with a transmittance of more than 90% for the pump wave and a reflectivity of more than 99% for the oscillation light (the medium film has the same effect as the input mirror); on the exit surface 8 of the saturable absorber 5, a dielectric film that transmits 30% of the oscillating light (the dielectric film has the same effect as the output mirror) is coated.

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Abstract

The invention relates to an all solid-state angular momentum tunable laser device with stable pulse energy. The all solid-state angular momentum tunable laser device comprises a pumping source, an optical coupling system, a resonant cavity, a solid laser medium and a saturable absorber; the pumping source is a semiconductor laser diode; the solid laser medium is a doped laser material Nd: YAG or Nd: YVO4; the saturable absorber is a Cr: YAG or GaAs crystal; and the resonant cavity consists of an input mirror and an output mirror or consists of a coating film on the incident surface of the solid laser medium and a coating film on an emergent surface of the saturable absorber. Laser output by the laser device provided by the invention is pulse laser with fixed energy and further has an optical angular momentum, and the continuous change of the angular momentum can be realized through altering the power of pump light. The laser device provided by the invention can be used for aspects such as optical communication, cold atom trapping, dynamic optical storage, and quantum computation. The tunable laser device is low in cost, small in size, stable in energy, high in peak power and tunable in the angular momentum and is flexible to adjust.

Description

technical field [0001] The invention relates to an all-solid-state angular momentum tunable laser with stable pulse energy, belonging to the technical field of lasers. Background technique [0002] With the development of science and technology, the application of laser is more and more extensive. It can be said that laser has changed our production and life, and improved and is improving our national economy. In many fields of lasers, lasers with angular momentum have become the focus of research in recent years. The field of quantum optics has important needs and applications. Due to the advantages of large single pulse energy and high peak power, pulsed laser has advantages that continuous laser does not have, and it has always been an important direction of laser development. There are two ways to generate pulsed laser: Q-switching technology and mode-locking technology. Mode-locked lasers must operate in a single transverse mode, which limits the possibility of such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/0941H01S3/08H01S3/10
Inventor 于浩海赵永光王正平张怀金许心光王继扬
Owner SHANDONG UNIV
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