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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

Inactive Publication Date: 2015-05-20
TSINGHUA UNIV
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Problems solved by technology

Although the above-mentioned lasers realize the tuning of the repetition rate, the tuning range is very limited

Method used

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

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Embodiment Construction

[0023] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0024] The system structure of the present invention is as figure 1 shown. The system consists of three parts: an erbium-doped fiber laser with tunable repetition rate based on a hybrid mode-locking mechanism, a repetition rate locking system and a computer control system.

[0025] The erbium-doped fiber laser with adjustable repetition rate based on the hybrid mode-locking mechanism includes a wavelength-division multiplexer 200 that is sequentially arranged on the output optical path of the pump source 1 to form a ring laser cavity through a single-mode optical fiber 210, and a piezoelectric Erbium-doped optical fiber 201 of ceramics 202, optical isolator 203, semiconductor saturable absorber 204, optical delay line 205, 1 / 4 wave plate 206, first 1 / 2 wave plate 207, polarization beam splitter 208 and second 1 / 2 2 wave plate 209, wavelength d...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/098
Inventor 杨丽君吴学健张弘元李岩尉昊赟
Owner TSINGHUA UNIV
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