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All-solid-state blue-green laser based on thulium-doped ion crystal

An ion crystal, blue-green light technology, applied in the field of lasers, can solve problems such as low efficiency and complex system, and achieve the effects of diverse wavelengths, reduced size, and rich varieties

Pending Publication Date: 2022-03-18
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the blue-green lasers obtained by existing technologies often have shortcomings such as low efficiency and complex systems, and it is difficult to meet the requirements of the modern information society for high-efficiency and highly integrated blue-green lasers.

Method used

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  • All-solid-state blue-green laser based on thulium-doped ion crystal
  • All-solid-state blue-green laser based on thulium-doped ion crystal
  • All-solid-state blue-green laser based on thulium-doped ion crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A 500-525nm tunable blue-green laser is frequency-doubled by two nonlinear frequency-doubling crystals using thulium-doped scandium oxide crystals as gain media.

[0047] structured as figure 1 As shown, it consists of an excitation source 1, a gain medium 2, a nonlinear frequency doubling crystal 3, a cavity mirror system, a tuning element M4, a refrigeration system, and a control system in the order of optical paths.

[0048] The excitation source 1 is a laser diode with an emission wavelength of 793 nm. Gain medium 2 is Tm:Sc with a doping concentration of 5at.% 2 o 3 The crystal is cut into a 3x3x5 mm square laser bar along the light-passing direction c, and the end face is polished. The nonlinear frequency doubling crystal 3 is divided into a primary frequency doubling crystal 31KTP and a secondary frequency doubling crystal 32LBO.

[0049] The laser cavity adopts a folded cavity design and uses three coated cavity mirrors. Plane mirror M 1 Coated with 2.0~2....

Embodiment 2

[0053] Thulium-doped lanthanum fluoride crystal is used as a gain medium, and a 462.5-500nm tunable blue-green laser is used for frequency doubling by a periodically poled lithium niobate crystal with a multi-period optical superlattice structure.

[0054] structured as figure 2 As shown, it is composed of an excitation source 1, a gain medium 2, a nonlinear frequency doubling crystal 3, a cavity mirror system, a tuning element, a refrigeration system, and a control system in the order of the optical path.

[0055] The excitation source 1 is a laser diode with an emission wavelength of 793 nm. Gain medium 2 is Tm:LaF with a doping concentration of 4at.%. 3 The crystal is cut into a 3x3x8 mm square laser bar along the light-passing direction c, and the end face is polished. The nonlinear frequency doubling crystal is a lithium niobate crystal designed with a special polarization period. There are two polarization periods in the same crystal, which can realize the quadruple f...

Embodiment 3

[0061] Thulium-doped yttrium-calcium aluminate crystal is used as the gain medium 2, and a 486.1nm blue laser is frequency-doubled by two nonlinear frequency-doubling crystals.

[0062] structured as image 3 As shown, it consists of an excitation source 1, a gain medium 2, a nonlinear frequency doubling crystal 3, a cavity mirror system, a refrigeration system, and a control system in the order of the optical path.

[0063] The excitation source 1 is a laser diode with an emission wavelength of 793 nm. Gain medium 2 is Tm:CaYAlO with a doping concentration of 4at.%. 4 The crystal is cut into a square laser bar of 3x3x6 mm along the light-passing direction a, and the end face is polished. The nonlinear frequency doubling crystal 3 is divided into a primary frequency doubling crystal 31PPLN and a secondary frequency doubling crystal 32LBO.

[0064] The laser cavity adopts a folded cavity design and uses three coated cavity mirrors. Plane mirror M 1 Coated with 1944.4nm hig...

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Abstract

The invention discloses an all-solid-state blue-green laser based on a thulium-doped ion crystal. The all-solid-state blue-green laser comprises an excitation source, a gain medium, a nonlinear frequency doubling crystal, an endoscope system and a tuning element, the plane mirror, the gain medium, the tuning element and the plane-concave cavity mirror are sequentially arranged along the laser output direction of the excitation source; a nonlinear frequency doubling crystal and a plano-concave rear cavity mirror are sequentially arranged in the direction of a reflection light path of the plano-concave cavity mirror, wherein a certain angle is formed between the plano-concave rear cavity mirror and the front light path; and the plane mirror, the plano-concave cavity mirror and the plano-concave rear cavity mirror jointly form a folded resonant cavity. Pump light emitted by the excitation source is injected into the gain medium after being collimated and focused, and output mid-infrared laser with the wavelength of 1.85-2.1 microns is converted by the nonlinear frequency doubling crystal to output blue-green laser with the wave band of 462.5-525nm. The laser has the advantages of abundant emission wavelength, tunable laser wavelength, high output power, high stability, simple structure, small size and the like.

Description

technical field [0001] The invention relates to a laser, in particular to an all-solid-state blue-green laser based on a thulium-doped ion crystal. Background technique [0002] The blue-green laser in the 462-525nm band is in the low-loss window of seawater, and has important applications in underwater detection, transmission, sensing and communication. In particular, the blue light at the wavelength of 486.1nm forms the Fraunhofer dark line in the solar radiation spectrum due to the absorption of hydrogen atoms. Using this wavelength for laser transmission or communication can effectively avoid environmental noise and improve the signal-to-noise ratio. With its advantages of short wavelength and small spot size, blue light laser can significantly increase the information capacity in optical storage, and has become a hot topic in the research of high-density optical storage. In addition, the blue-green laser also corresponds to the absorption band of oxygen-containing hemo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/081H01S3/109H01S3/16
CPCH01S3/1616H01S3/0815H01S3/109
Inventor 杭寅杨依伦房倩楠朱影
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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