A dye-doped chiral nematic liquid crystal tunable laser and its preparation method

A chiral nematic phase, laser tuning technology, applied in lasers, laser parts, devices for controlling laser output parameters, etc., can solve problems such as long application distances, and achieve the effects of reducing light leakage, enhancing strength, and improving pumping efficiency.

Inactive Publication Date: 2016-10-05
SHENYANG LIGONG UNIV
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  • A dye-doped chiral nematic liquid crystal tunable laser and its preparation method
  • A dye-doped chiral nematic liquid crystal tunable laser and its preparation method
  • A dye-doped chiral nematic liquid crystal tunable laser and its preparation method

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Embodiment Construction

[0056] A dye-doped chiral nematic liquid crystal tunable laser, comprising an upper glass substrate 1 and a lower glass substrate 2 arranged in parallel, characterized in that:

[0057] The upper glass substrate 1 and the lower glass substrate 2 are transparent glass substrates with a thickness of 1.1 mm and an area of ​​2 cm×2 cm, and the overall flatness is ≥1 / 10 wavelength.

[0058] Eight pairs of titanium dioxide and silicon dioxide dielectric film layers 3 are alternately plated on the inner wall of the upper glass substrate 1 , with thicknesses of 55nm and 80nm respectively. When the incident angle of the 532nm pump laser is 20°, the wavelength of the pump laser is 532nm. Radiation laser wavelength 610-660nm (varies in this range when temperature tuning) is reflected.

[0059] Eight pairs of titanium dioxide and silicon dioxide dielectric film layers 4 are alternately plated on the inner wall of the lower glass substrate 2, with thicknesses of 78nm and 118nm respectively....

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Abstract

A dye-doped chiral nematic liquid crystal tunable laser and a preparation method thereof, comprising upper and lower substrates, the upper and lower substrates are alternately plated with multi-layer titanium dioxide and silicon dioxide dielectric film layers, the upper and lower substrates are Orientation films are respectively arranged on the multi-layer dielectric film, and are rubbed anti-parallel to form a liquid box. The thickness of the liquid crystal cell is 4 mm, and the liquid crystal cell is filled with dye-doped chiral nematic liquid crystal made of nematic liquid crystal SLC12V620, chiral agent S8-11 and dye DCM. With a pulse frequency of 5 Hz, a solid Nd:YAG frequency-doubled 532 nm wavelength laser is used as the pump light source, and the incident angle is 20°. The invention has a narrow line width, increases the intensity of the radiated laser, improves the pumping efficiency, and saves energy. In particular, the laser works stably and is easy to tune.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic devices, and relates to a dye-doped chiral nematic liquid crystal tunable laser with high radiation intensity and temperature tuning. Background technique [0002] The tunable lasers currently being used and researched mainly include semiconductor tunable lasers and fiber tunable lasers. In order to realize the laser wavelength tuning output, the two involve more devices and more complex structures. [0003] Laser dyes can obtain a broad fluorescence spectrum from ultraviolet to near infrared, so dye lasers can obtain a wide range of emitted laser light. The chiral nematic liquid crystal in the planar alignment state is known as a self-assembled one-dimensional photonic crystal, which has a photon forbidden band (ie, a reflection band). And under the action of external fields (temperature, electric field, pressure, magnetic field, etc.), the position of the photon forbidden band moves. O...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13G02F1/1333G02B5/28H01S3/107H01S5/06
Inventor 乌日娜岱钦
Owner SHENYANG LIGONG UNIV
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