Single optical frequency comb with high stability and high repetition frequency

A high repetition rate, optical frequency comb technology, applied in the field of femtosecond lasers, can solve technical difficulties and unseen problems, achieve high output power, long locking time, and improve stability

Inactive Publication Date: 2010-09-29
INST OF PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Since the ideal repetition frequency required by the optical comb is generally greater than 200MHz, it has not been used in the actual optical frequency measurement so far, especially because of the technical difficulty of the high repetition frequency sub-10fs broadband laser required by this scheme, the international community has been No similar research reports

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  • Single optical frequency comb with high stability and high repetition frequency
  • Single optical frequency comb with high stability and high repetition frequency
  • Single optical frequency comb with high stability and high repetition frequency

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Embodiment Construction

[0028] figure 1 It is a block diagram of the principle of the present invention.

[0029] like figure 1As shown, a 532nm single-frequency continuous full-curing frequency-doubling yttrium vanadate laser is used as the pump source. The pump light passes through the AOM and enters a period-scale Ti:sapphire oscillator, and then the femtosecond pulse output by the oscillator is divided into a small part by The PIN tube receives the repetition frequency signal, and most of it enters the difference frequency crystal to measure the CEO frequency. The optical pulse after the difference frequency measurement system is divided into two parts. The infrared light is received by the infrared APD to obtain the CEO frequency signal, and the visible light part is used as the available light of the optical comb. pulse output. Finally, in order to obtain an absolutely stable optical comb output, the repetition frequency received by the PIN and the CEO frequency electrical signal received by ...

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Abstract

The invention discloses manufacturing method and equipment of a single optical frequency comb with high stability and high repetition frequency. The method comprises the following specific steps of: outputting femtosecond pulses with high repetition frequency, wide spectrum and pulse width less than 7 fs by using a cycle-grade femtosecond titanium sapphire oscillator; carrying out beat measurement of the CEO of the femtosecond pulses by using a single nonlinear crystal; and simultaneously locking repetition frequency and CEO frequency to a stable external microwave reference source by using a circuit feedback technology. The equipment comprises the cycle-grade femtosecond titanium sapphire oscillator, the single nonlinear crystal beat measurement fceo device and a feedback circuit device controlled on the basis of the phase lock principle. The invention has the characteristics of compact equipment structure, long locking time, high usable output power, small phase noise and the like, and is mainly applied to the scientific researches of absolute optical frequency measurement, optical clock composition, atto-second production and the like.

Description

technical field [0001] The invention relates to the field of femtosecond laser technology, in particular to a phase-stable femtosecond laser frequency comb technology and device. Background technique [0002] Femtosecond optical frequency comb technology is one of the most cutting-edge research contents of ultrashort pulse laser science. Since the end of last century, people have proposed and realized the femtosecond laser carrier-envelope phase offset (Carrier-Envelope phase Offset, CEO) Since the phase-locked control of , see: D.J. Jones et al, 2000 Science 288 635; Apolonski et al, Phys. Rev. 2000 Lett85 740. The development of this technology has not only led to the revolutionary progress of optical frequency measurement research, but also realized the unprecedented direct connection of optical frequency and microwave frequency, and promoted the rapid development of attosecond laser physics and ultrafast science. In 2005, J.Hall, a scientist from the National Institute ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35H01S3/16
Inventor 魏志义韩海年张炜赵研英杜强滕浩
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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