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Sheet micro-cavity near infrared seed light injection locking tunable intermediate infrared narrow line-width optical parameter amplifier

A near-infrared, narrow-linewidth technology, applied in the field of laser light sources, can solve the problems of loss of tuning ability, high-frequency pulse narrow-linewidth output and high difficulty

Active Publication Date: 2017-07-25
NANJING UNIV
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Problems solved by technology

Therefore, for OPO with strong wavelength tuning ability of mid-infrared output, if the wavelength is controlled by seed light injection, the relative loss of tuning ability is also obvious, and it is also difficult to achieve narrow linewidth output of high-frequency pulses.

Method used

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  • Sheet micro-cavity near infrared seed light injection locking tunable intermediate infrared narrow line-width optical parameter amplifier
  • Sheet micro-cavity near infrared seed light injection locking tunable intermediate infrared narrow line-width optical parameter amplifier
  • Sheet micro-cavity near infrared seed light injection locking tunable intermediate infrared narrow line-width optical parameter amplifier

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 1 Shown, be the schematic diagram of total system principle of the present invention, also be device and light path diagram; Laser is the total pumping light source, 1, mirror M1-M2, 1-1 polarizer, 2, PBS is polarization beam splitter, 3, The first to the fourth focusing lenses f1-f4, 4, filters, 5, lithium triborate crystal, LBO frequency doubling device, 6, sheet microcavity optical parametric oscillator, SOPO, 7, beam combiner, 8, non The linear crystal is MgO:PPLN.

[0026]The 1064nm single-frequency laser with nanosecond pulses is used as the pump source. After adjustment, the adjusted polarization is introduced through a half-wave plate, and then the beam is split by the PBS (polarization beam splitter). The horizontal polarization is used to generate SOPO A near-infrared single-frequency narrow-linewidth seed light. The other vertical po...

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Abstract

The invention discloses a sheet micro-cavity near infrared seed light injection locking tunable intermediate infrared narrow line-width optical parameter amplifier which comprises main pump light, a seed light source, a sheet micro-cavity light optical parameter oscillator (amplifier) and a high-pass optical filter. The main pump light is a single-frequency nanosecond laser device with the wavelength of 1064 nm, and pump light can be outputted for integral systems by the main pump light; a seed light system comprises light beam shaping lens systems, and the main pump light with the wavelength of 1064 nm is subjected to frequency doubling by means of birefringence phase matching by the aid of lithium boric oxide crystals, namely LBO, so that the pump light with the wavelength of 1064 nm can be converted into a single-frequency seed pump light source with the wavelengths of 532 nm; an optical parameter amplification system comprises the single-frequency pump light source with the wavelength of 1064 nm, a beam combiner and nonlinear periodically poled crystals, and the seed light system is responsible for generating injection locking near infrared narrow line-width single-frequency seed light.

Description

technical field [0001] The invention relates to the technical field of laser design, in particular to a laser light source that can be used in the fields of gas absorption detection, laser radar, photoelectric countermeasures and medical applications. Background technique [0002] Mid-infrared narrow-linewidth single-frequency laser is one of the hot research directions of modern laser engineering application technology. It has special advantages such as single-frequency narrow linewidth, stable frequency, high signal-to-noise ratio, and good coherence. It is urgently needed in practical fields such as gas absorption detection, lidar, photoelectric countermeasures, and medical applications, as well as scientific research directions such as spectroscopy. In the 2-5 micron band, due to the lack of relevant laser gain media, it is usually realized using nonlinear frequency conversion technology. However, the gain spectrum linewidth of the nonlinear conversion process is genera...

Claims

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Application Information

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IPC IPC(8): H01S3/10H01S3/091G02F1/39
CPCH01S3/091H01S3/10007H01S3/10092G02F1/39G02F1/392
Inventor 赵刚石晨星汪小涵吕新杰谢臻达祝世宁
Owner NANJING UNIV
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