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1216-nm all-solid raman laser

A Raman laser, all-solid-state technology, applied in the laser field, achieves the effect of strong absorption, increased output power, and small water absorption coefficient

Inactive Publication Date: 2014-07-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lasers with this wavelength have not been reported

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  • 1216-nm all-solid raman laser

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Embodiment Construction

[0009] The following is attached figure 1 The present invention is further described with embodiment:

[0010] The structure of a 1216nm all-solid-state Raman laser is as follows figure 1 As shown, it includes a 1079nm fundamental frequency optical resonator front cavity mirror 101, a side pump source 808nm semiconductor laser 102, a Nd:YAP crystal 103, a 1079nm quarter-wave plate 104, a KD*P electro-optic Q-switched crystal 105, and a Raman Resonant cavity front cavity mirror 106, Raman crystal Ba(NO 3 ) 2 107 and coupled out mirror 108. Nd:YAP crystal 103, 1079nm quarter-wave plate 104, KD*P electro-optic Q-switching crystal 105, pump The source 102 is placed on both sides of the Nd:YAP crystal 103, and it is ensured that the pump light does not enter the opposite semiconductor laser to avoid damage to the pump source. Raman crystal Ba(NO 3 ) 2 . The front cavity mirror 106 of the Raman resonator is coated with a 1079nm high reflection film on the front cavity mirror...

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Abstract

A 1216-nm all-solid Raman laser structurally comprises a 1079-nm fundamental frequency light resonant cavity front cavity mirror, Nd:YAP crystals, a 1079-nm quarter-wave plate, KD*P electro-optical modulation Q crystals, a Raman resonant cavity front cavity mirror, Raman crystals Ba(NO3)2 and a coupling output mirror which are all arranged in sequence to have the same optical axis. Pumping sources are placed on the two sides of the Nd:YAP crystals. Because the side pumping mode is adopted for the 1216-nm all-solid Raman laser, the output power of the Raman laser can be substantially promoted; meanwhile, because the inner cavity type Raman laser structure is adopted, the high power and the high density of pumping light in the cavity can be fully utilized, and the threshold of the inner cavity type Raman laser is lower. Because the water absorption coefficient at the 1210-nm waveband is small and meanwhile CH2-rich fat has stronger absorption at the waveband than epithelial cells, lasers at the waveband can be used for imaging of subcutaneous fat, and the 1216-nm all-solid Raman laser has certain market prospects.

Description

technical field [0001] The invention relates to the field of laser technology, in particular a 1216nm all-solid-state Raman laser is invented. Background technique [0002] In the light band window from 1000nm to 1300nm, water has a small absorption coefficient near the 1210nm band, while fat rich in CH 2 The key has a large absorption coefficient in this band, and lasers in this band can be used to detect fat. Studies have shown that fat 1cm deep under the epidermis absorbs the 1210nm wavelength laser more than twice as much as the epidermis. Therefore, the laser in this band does not need to inject any detection marks into the object to be tested for the detection of subcutaneous fat, and it is a non-invasive imaging method, which is also the development trend of human body imaging in the future. [0003] For the laser near the 1210nm band, there is no laser medium that can directly generate laser light to reach this band, so it is necessary to use the nonlinear effect t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/30H01S3/091
Inventor 陈卫标喻乾桓王明建
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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