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Laser heterodyne device based on photon counting statistics of MPPC (multi-pixel photon counter)

A laser heterodyne and photon counting technology, which is applied in the field of laser active detection research, can solve the problems of light source power and coherence, etc., and achieve the effects of convenient signal reception, high detection sensitivity, and improved operating distance

Inactive Publication Date: 2012-07-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0012] The present invention proposes a laser heterodyne device based on MPPC photon counting statistics in order to solve the problem that the light source power and coherence are contradictory in the existing laser heterodyne detection

Method used

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  • Laser heterodyne device based on photon counting statistics of MPPC (multi-pixel photon counter)
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  • Laser heterodyne device based on photon counting statistics of MPPC (multi-pixel photon counter)

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Embodiment Construction

[0026] combine Figure 1 to Figure 5 Description of this embodiment, a laser heterodyne device based on MPPC photon counting statistics, the device includes a laser 1, a laser beam splitter 2, a laser beam expander 3, a rotating diffuse reflection target 4, an AC servo motor 5, and a brake 24V power supply 6. Variable DC drive power supply 7, Acousto-optic modulator 8, Signal transmitter 9, 24V DC drive power supply 10, Residual light absorption cell 11, Variable attenuator 12, Half wave plate 13, Small magnification beam expansion Device 14, laser echo receiving telescope 15, optical narrowband filter 16, polarization beam splitting plate 17, optical gate 18, laser coupling lens 19, MPPC photon counter 20, portable computer 21, high frequency oscilloscope 22, high resolution spectrum analysis Instrument 23.

[0027] The specific working process is as follows: Laser 1 emits a beam with a wavelength of 532nm, which is reflected and transmitted by laser beam splitter 2, wherein...

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Abstract

The invention discloses a laser heterodyne device based on photon counting statistics of MPPC (multi-pixel photon counter), relates to the field of laser active detection research and aims at solving the problem of contradiction between the power of a light source and a coherent phase in the existing laser heterodyne detection. According to the device disclosed by the invention, a light beam emitted by a laser passes through a laser beam splitter mirror and then is reflected and transmitted, a reflected light beam passes through an acousto-optic modulator for acousto-optic diffraction and then is incident to a polarization beam-splitting flat plate, and the light beam after passing through the polarization beam-splitting flat plate is reflected to a laser coupling lens; the transmitted light beam passes through a laser beam expanding lens and then is incident to the surface of a rotating diffused reflection target, echo photons which are collected by a laser echo receiving telescope is subject to filtering processing through an optical narrow-band filter, and the light beam after passing through the polarization beam-splitting flat plate is transmitted to the laser coupling lens; and electric signals are received by a signal receiving device after the light beam is focused to the surface of the MPPC and optical interference occurs. The MPPC is larger in the receiving surface, and a detector can work in a non-high-voltage state so as to facilitate the implementation of signal receiving.

Description

technical field [0001] The invention relates to the field of laser active detection research, in particular to the use of a multi-pixel photon counter (Multi-Pixel Photon Counter, referred to as MPPC) MPPC photon counter to realize laser heterodyne detection of weak signals, and to extract The Doppler frequency shift caused by the target's motion or rotation provides the target's motion information. Background technique [0002] Laser heterodyne detection technology uses the principle of dual-frequency laser interference to realize non-contact measurement of weak target information. Specific applications can be divided into the following three levels: [0003] 1. Remote measurement [0004] Using laser heterodyne detection technology can realize Doppler tracking of satellites in orbit (non-cooperative targets), and the working distance can reach thousands of kilometers. A typical system is the Hi-CLASS system of the Maui Island Space Observatory (MSSS) in the United State...

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Application Information

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IPC IPC(8): G01S17/58
Inventor 张合勇赵帅王挺峰郭劲刘立生
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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