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Laser phase locking frequency stabilizing device and method based on iodine molecule filter

A technology of iodine molecules and filters, which is applied in the field of laser phase-locking and frequency stabilization devices based on iodine molecular filters, can solve the problems of complex systems, high input optical power, waste of detection optical power, etc., and achieve simple frequency-locking optical path structure, The effect of low laser power requirements

Active Publication Date: 2015-06-24
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Benefits of technology

The technical effect described by this patented technology compared to existing techniques can improve stability over time without increasing any extra energy or requiring more complex equipment like an atomoscope.

Problems solved by technology

The technical problem addressed in this patented method involves improving the stability of lasing frequencies during spectral measurements on small particles such as air pollution or cigarette smoke (a type called particulate matter). Current methods involve either directly measuring the lasering frequency itself through an external source like sunlight or detecting it indirectly via spectrometry techniques. However these methods have limitations due to factors including complexity and wastefulness when used alone.

Method used

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  • Laser phase locking frequency stabilizing device and method based on iodine molecule filter
  • Laser phase locking frequency stabilizing device and method based on iodine molecule filter

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0025] Please see first figure 1 , figure 1 It is a structural diagram of the laser phase-locked frequency stabilization device based on the iodine molecular filter of the present invention, the thick solid line represents the optical signal, and the thin solid line represents the electrical signal. As shown in the figure, a laser phase-locked frequency stabilization device based on an iodine molecular filter includes: a single-frequency laser source 1, a microwave driver 2, a phase modulator 3, an iodine molecular filter 4, a positive lens 5, and a photodetector 6 and data processor 7.

[0026] Each part of the system is described as follows:

[0027] Single frequency laser source 1: output single longitudinal mode laser, and the laser frequency can be tuned.

[0028] Microw...

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Abstract

The invention relates to a laser phase locking frequency stabilizing device based on an iodine molecule filter. The laser phase locking frequency stabilizing device comprises a single-frequency laser source, a microwave driver, a phase modulator, the iodine molecule filter, a positive lens, a photoelectric detector and a data processor. 532 nm light output by a single-frequency laser is subjected to electro-optic phase modulation, frequency error signals are formed on the data processor through the iodine molecule filter, the data processor feeds back voltage signals, by changing the cavity length of the single-frequency laser source, laser frequency is stabilized at the iodine molecule absorption valley bottom or peak frequency, and the device has the advantages of being compact in structure, simple in light path, low in light power requirement and high in frequency stabilizing accuracy.

Description

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Claims

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Application Information

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Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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