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Optical-balance cross-correlation long-distance mode-locking laser short-period stability measurement device

A technology for measuring devices and mode-locked lasers, which can be used in measuring devices, optical instrument testing, and optical performance testing, and can solve problems such as increasing measurement errors

Active Publication Date: 2018-11-23
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

[0004] However, in the actual test, the laser pulse undergoes a change in the optical path of the transmission medium between the output of the laser and the photoelectric detection, which increases the measurement error to a certain extent

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  • Optical-balance cross-correlation long-distance mode-locking laser short-period stability measurement device
  • Optical-balance cross-correlation long-distance mode-locking laser short-period stability measurement device

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Embodiment Construction

[0028] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all implementations. Exhaustive list of examples. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

[0029] In the actual test, the optical path of the laser pulse from the laser output to the photodetection changes through the transmission medium, which increases the measurement error to a certain extent. For example, the effect of temperature change on relative change in optical path length is 10 -7 / K level, for a temperature fluctuation of 10mK, the pulse time delay corresponds to the fs level, which is close to the time domain jitter performance ind...

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Abstract

The invention provides an optical-balance cross-correlation long-distance mode-locking laser short-period stability measurement device, and the device comprises a first mode-locking laser, a second mode-locking laser, and an upper computer, wherein the first and second mode-locking lasers perform the opposite common-path transmission. The upper computer carries out the analysis of the time jittervariation of the first and second mode-locking lasers, and obtains a short-period stability noise power spectrum. According to the invention, the technical scheme combines an optical-balance cross-correlation method with a laser pulse common-optical-path bidirectional symmetric transmission configuration, eliminates the error caused by the changes of a laser pulse transmission path, and can achieve the high-precision short-period stability testing of a long-distance mode-locking laser.

Description

technical field [0001] The invention relates to a device for measuring short-term stability of long-distance mode-locked lasers based on optical balance and cross-correlation. Background technique [0002] Compared with common RF frequency generation and synthesis modules, such as atomic clocks and frequency synthesizers, mode-locked lasers have more excellent short-term time-domain stability characteristics (τ<100ms). Typically, when measuring the short-term stability of a mode-locked laser, photoelectric conversion is required, which introduces additional noise. [0003] In order to effectively reduce the influence of additional photoelectric conversion noise, the optical balance cross-correlation method is usually used to measure the short-term time-domain stability characteristics of mode-locked lasers. The optical balance cross-correlation method converts the relative time difference between laser pulses into a voltage signal, which is equivalent to the direct detec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01M11/02
CPCG01M11/00G01R31/00
Inventor 杨宏雷张升康赵环
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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