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Te, cadmium and Hg optical range limiter with the continuously adjusting output light intensity of the passive saturated clamp

An output light, passive technology, applied in the structure/shape of lasers, laser parts, optical resonators, etc., can solve the problem that the output light intensity cannot be continuously adjusted.

Inactive Publication Date: 2009-02-11
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
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  • Description
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Problems solved by technology

Although this method effectively increases the two-photon absorption length of the material, its output light intensity remains at a fixed value and does not satisfy the continuously adjustable output light intensity.

Method used

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  • Te, cadmium and Hg optical range limiter with the continuously adjusting output light intensity of the passive saturated clamp
  • Te, cadmium and Hg optical range limiter with the continuously adjusting output light intensity of the passive saturated clamp

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Embodiment Construction

[0015] Below with the incident wavelength 7920nm as the design wavelength, in conjunction with the accompanying drawings the specific implementation of the optical limiter of the present invention is described in detail:

[0016] The resonant cavity 1 of the HgCdTe optical limiter of the present invention is made up of a pair of distributed Bragg mirrors 2, and two opposite mirror surfaces are coated with (HL) m or (LH) m dielectric film 3, and mirror substrate material is Ge, L is the low refractive index film layer SiO, H is the high refractive index film layer PbTe, its refractive index is 2.35 and 5.55 respectively, m is the number of high and low refractive index film layers alternately laminated, m=2, and the optical thickness of the film layer is lambda 0 / 4, the resonant cavity length is 7.92mm. The HgCdTe photodiode 4 is placed in the resonant cavity, and the space charge region 5 in the p-n junction of the photodiode is at the center of the resonant cavity, so that ...

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Abstract

This invention discloses one passive saturation clamp output light intensity continuous adjusting mercury-cadmium-tellurium limit range device, which comprises one pair of Brag reflection lens formed F-P optical resonance chamber and the Hectic photoelectric diode in middle of F-P optical resonance chamber middle as absorptive layer and the direct current stable power exerted onto diode.

Description

technical field [0001] The invention relates to a passive semiconductor optical limiter, in particular to a mercury cadmium telluride (HgCdTe) optical limiter which can realize continuous adjustment and saturation clamping of the output light intensity of a high-power laser. Background technique [0002] The optical limiting device has the characteristic that its output intensity changes linearly with the incident light intensity under low incident light intensity, and its output light intensity is clamped at a fixed saturation value under high incident light intensity. With the continuous development of high-power tunable pulsed laser technology, in order to protect precision optical devices and human eyes from damage, there is an urgent need to have a suitable optical limiter. At the same time, the optical limiter is also one of the important applied optical components in the field of optical amplitude stabilization and optical communication. Optical limiters can be divid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/107H01S3/08H01L31/068G02F1/015
CPCY02E10/50
Inventor 陆卫崔昊杨李志锋李宁甄红楼张波陈平平李天信陈效双
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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