Tunable narrow-band UV laser generating device and generating method therefor
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A technology of ultraviolet laser and generating device, applied in the field of laser technology, can solve the problems of high cost of acquisition method, insufficient ability to tune a wide range of light sources, etc.
Inactive Publication Date: 2012-07-11
HARBIN INST OF TECH
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[0003] The purpose of the present invention is to provide a tunable narrow-band ultraviolet laser generator and its generation method in order to solve the problem of insufficient large-range tuning capability of the existing tunable narrow-band ultraviolet laser source and the high cost of obtaining the method
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specific Embodiment approach 1
[0026] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment mode, the tunable narrow-band ultraviolet laser generating device described in this embodiment mode, it comprises the first diode laser 1, it also comprises grating 2, grating adjustment frame 3, grating controller 4, first mirror 5, Sawtooth wave generator 6, second diode laser 7, second reflector 8, dichroic mirror 9, lens group 10, BBO crystal 11, convex lens 12, triangular prism 13 and aperture 14,
[0027] The grating 2 is arranged on the grating adjustment frame 3, and the attitude of the grating adjustment frame 3 is controlled by the grating controller 4,
[0028] The laser beam emitted by the first diode laser 1 is incident on the grating 2, and the reflected light beam of the grating 2 is incident on the front of the dichroic mirror 9 after being reflected by the first reflector 5,
[0029] The voltage signal output end of the sawtooth wave generator 6 i...
specific Embodiment approach 2
[0032] Embodiment 2: This embodiment is a further description of Embodiment 1. The laser source of the first diode laser 1 is a Fabry-Perot type single transverse mode, multi-longitudinal mode laser diode, and the central wavelength of the emitted beam is 370nm ~ 470nm.
specific Embodiment approach 3
[0033] Embodiment 3: This embodiment is a further description of Embodiment 1 or 2. The laser source of the second diode laser 7 is a distributed feedback type or distributed Bragg reflection type single longitudinal mode laser diode, and the center of the emitted beam is The wavelength is 635nm ~ 1550nm.
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Abstract
The invention discloses a tunable narrow-band UV laser generating device and a generating method therefor, and belongs to the field of laser technology. The invention solves the problem that a conventional tunable narrow-band UV laser light source is insufficient in wide range tuning capability and the cost is high due to the obtaining way. The tunable narrow-band UV laser generating device comprises a first diode laser, and further comprises a grating, a grating adjusting bracket, a grating controller, a first reflecting mirror, a sawtooth wave generator, a second diode laser, a second reflecting mirror, a dichroic mirror, a lenses group, BBO (Barium Boron Oxide) crystal, a convex lens, a triangular prismy and a diaphragm. In the invention, the two diode lasers are used, and the tunable narrow-band UV laser can be generated through sum frequency, and since the emission band width of the semiconductor laser is smaller than 10 MHz, the band width of the UV laser after sum frequency is guaranteed to be smaller than 0.01 pm. The tunable narrow-band UV laser generating device is suitable for generating tunable narrow-band UV laser.
Description
technical field [0001] The invention relates to a tunable narrow-band ultraviolet laser generating device and a generating method thereof, belonging to the field of laser technology. Background technique [0002] At present, there are mainly two ways to obtain ultraviolet light sources: one is directly obtained excimer ultraviolet laser, and the other is indirectly obtained nonlinear frequency conversion laser. The type of laser light source used for nonlinear frequency conversion in the latter is mainly There are dye lasers, crystal dielectric lasers, semiconductor lasers and optical parametric oscillators. Excimer ultraviolet lasers and most nonlinear frequency conversion laser sources are pulsed output, and the Heisenberg uncertainty relation, one of the basic laws of physics, determines that the laser bandwidth is greater than 1pm. In atomic absorption applications, the absorption spectrum width of most atoms in the ultraviolet region is less than 5pm. In order to obtai...
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