Small-size optical fiber femtosecond laser with wide repetition frequency tuning range

A technology of femtosecond lasers and fiber lasers, applied in the field of measurement, can solve problems such as limited tuning range
CN104638501AInactive Publication Date: 2015-05-20TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2015-05-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a small-size optical fiber femtosecond laser with a wide repetition frequency tuning range. The small-size optical fiber femtosecond laser comprises a repetition frequency adjustable erbium-doped optical fiber laser based on a mixing mode-locking mechanism, a repetition frequency locking system and a computer control system, wherein the erbium-doped optical fiber laser is provided with an annular cavity, an automatically controlled optical delay line is added into the cavity, the repetition frequency of the laser can realize the large-range tuning, and in order to realize the repetition frequency stabilization, on one hand, piezoelectric ceramics are used for controlling the length of the gain optical fiber, so that the short period fluctuation of the repetition frequency is inhibited; on the other hand, the large-range long-period fluctuation of the repetition frequency can be compensated through regulating an optical delay line. The femtosecond laser has the advantages that the size is small, the stability is high, the repetition frequency tuning performance is realized, the repetition frequency can be controlled, and the like. The work potential in industrial environment is realized.
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Description

technical field

[0001] The invention belongs to the field of measurement technology, in particular to a miniaturized fiber femtosecond laser with a wide repetition frequency tuning range. Background technique

[0002] Using two femtosecond lasers with a certain repetition rate difference to form an asynchronous time-domain sampling system can achieve high-precision absolute distance measurement and precise spectrum measurement. This method has become a hot spot in the field of laser precision measurement because of its advantages of fast measurement speed and high accuracy. The performance of the femtosecond laser is the bottleneck of the entire measurement system. Although the currently used fiber femtosecond laser has the advantages of small size, low price and good stability compared with the solid-state femtosecond laser, in order to use femtosecond laser for precision measurement in industrial applications, the fiber femtosecond laser Performance still needs to be imp...

Claims

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