A locking device for all-fiber continuous light and optical frequency comb
A technology of optical frequency comb and locking device, which is applied in optics, nonlinear optics, instruments, etc., can solve problems such as poor anti-noise ability, poor signal-to-noise signal of beat frequency signal, and affect the locking effect, etc., and achieve good long-term stability
Active Publication Date: 2018-10-16
上海镱镭飞秒激光技术有限公司
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Problems solved by technology
[0005] 1. In the traditional method, there is an interval between the continuous light and a certain comb of the optical frequency comb, and it is impossible to achieve complete coincidence.
[0006] 2. The spatial optical path is sensitive to spatial physical jitter and has poor anti-noise ability, which seriously affects the locking effect
[0007] 3. It is difficult to adjust the beat frequency, and the signal-to-noise ratio of the beat frequency signal is poor, and the response requirements for the feedback servo circuit system are high
[0008] In short, the traditional technology has great difficulty in realizing the complete coincidence locking of high-performance continuous light and optical frequency comb
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[0033] In the following embodiments, the given locking device of the all-fiber continuous light and the optical frequency comb uses a filter to select the same wavelength band as the continuous light, and outputs it through a single-mode polarization-maintaining fiber.
[0034] The optical frequency comb is based on an all-solid-state optical frequency comb or an optical frequency comb based on a fiber laser. Its repetition frequency and carrier envelope phase shift frequency are precisely locked on a radio frequency source. The output spectrum of the optical frequency comb covers continuous optical wavelengths.
[0035] Based on an all-solid-state optical frequency comb or an optical frequency comb based on a fiber laser, its repetition rate and carrier envelope phase shift frequency are precisely locked on a stable radio frequency source through a phase-locked loop circuit; the control of carrier envelope phase shift frequency It is realized by feed-forward or current modulat...
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The invention relates to a locking device for all-fiber continuous light and optical frequency comb, which includes an optical frequency comb, a continuous laser, a beat frequency device, a frequency shifting device, a reference signal source, a frequency synthesizer and a fast phase-locked loop circuit. The optical frequency comb can ensure the stable operation of the system for a long time, and its repetition frequency and carrier envelope phase shift frequency are locked on a stable reference signal source; the continuous laser can be an external cavity semiconductor laser or a continuous fiber laser, using It is used to lock it on a certain comb tooth of a precise optical frequency comb; the input and output ends of the frequency shifting device and the frequency beating device are connected by polarization-maintaining optical fibers to assist in the complete coincidence of the continuous light and the optical frequency comb. locking. Its structure is compact and small; the beat frequency structure is simple and easy, and the signal-to-noise ratio is high; the locking stability is good and the accuracy is high; at the same time, it can ensure that the continuous light completely coincides with a certain comb tooth of the optical frequency comb, so that complete coincidence locking can be achieved.
Description
technical field [0001] The invention relates to the field of ultrafast laser precision measurement, in particular to a locking device for all-fiber continuous light and an optical frequency comb. Background technique [0002] In recent years, with the continuous development of optical frequency comb technology, optical frequency combs have been widely used in many fields such as high-precision resolution laser spectroscopy, measurement of fundamental physical constants, optical atomic clocks, absolute distance measurement, and low-noise microwave signal generation. Among these wide-ranging applications, the locking of continuous light and optical frequency comb is an essential technology. Therefore, in order to obtain a high-performance locking method in which the continuous light and a certain comb tooth of the optical frequency completely coincide, it has been widely concerned by people. [0003] The traditional method to realize the locking of continuous light and optica...
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IPC IPC(8): G02F1/35
CPCG02F1/353
Inventor 侯磊白晋涛郭鸿宇陆宝乐陈浩伟
Owner 上海镱镭飞秒激光技术有限公司