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Frequency synchronization passive mode-locked fiber laser and method for realizing frequency synchronization

A fiber laser and passive mode-locking technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of limited repetition frequency range of adjustment and affect applications, and achieve wide frequency adjustment range, simple structure, large The effect of applying the foreground

Inactive Publication Date: 2020-05-05
WUHAN YANGTZE SOTON LASER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cavity length changes caused by these two methods are often on the order of microns. When applied to conventional passive mode-locked lasers with a repetition frequency of tens of megahertz, the cavity length of the resonator is often in the range of several meters to tens of meters. In the interior, the change of the cavity length is extremely small, and the range of the repetition frequency of the adjustment is also very limited, which affects the actual application to a certain extent

Method used

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  • Frequency synchronization passive mode-locked fiber laser and method for realizing frequency synchronization
  • Frequency synchronization passive mode-locked fiber laser and method for realizing frequency synchronization

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Embodiment 1

[0024] Embodiment 1 of the present invention provides a frequency synchronous passive mode-locked fiber laser, including a passive mode-locked fiber laser 11 , a frequency locking device 12 and an external signal source 13 .

[0025] like figure 1 As shown, the passive mode-locked fiber laser 11 is the light source part of the present invention, including: a guide rail 101 with a stepping motor, a piezoelectric ceramic 102, a saturable absorbing mirror 103, a pump laser 108 and a sequentially coupled collimator 104 , doped fiber 105, dichroic mirror 106, wavelength division multiplexer 107 and first coupler 109, wherein saturable absorbing mirror 103, collimator 104, doped fiber 105 and dichroic mirror 106 constitute a passive mode-locked fiber The linear cavity of the laser 11.

[0026] The pump laser 108 is connected with the wavelength division multiplexer 107, and the pump laser 108 is used to generate the pumping light that excites the doped fiber 105, the pump laser 108...

Embodiment 2

[0035] Embodiment 2 of the present invention provides another frequency synchronous passive mode-locked fiber laser, including a passive mode-locked fiber laser 21 , a frequency locking device 22 and an external signal source 23 .

[0036] Such as figure 2 As shown, the passive mode-locked fiber laser 21 is the light source part of the present invention, including: a guide rail 201 with a stepping motor, a piezoelectric ceramic 202, a saturable absorbing mirror 203, a pump laser 208, and a sequentially coupled collimator 204 , doped fiber 205, circulator 206, wavelength division multiplexer 207, second coupler 2091 and third coupler 2092, wherein saturable absorbing mirror 203, collimator 204, doped fiber 205, circulator 206, The wavelength division multiplexer 207 and the second coupler 2091 form a ring cavity of the passively mode-locked fiber laser 21 .

[0037] The pump laser 208 is connected with the wavelength division multiplexer 207, and the pump laser 208 is used to...

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Abstract

The invention discloses a frequency synchronization passive mode-locked fiber laser and a method for realizing frequency synchronization. The frequency synchronization passive mode-locked fiber lasercomprises a passive mode-locked fiber laser body, a frequency locking device and an external signal source. The passive mode-locked fiber laser body comprises a guide rail with a stepping motor, piezoelectric ceramic and a resonant cavity. The frequency locking device comprises a photoelectric detector, a filter, a frequency mixer and a servo system which are electrically connected in sequence. The frequency locking device converts an optical signal output by the passive mode-locked fiber laser into an electric signal, and then the electric signal passes through the filter and the frequency mixer to obtain a differential signal; and the differential signal is processed by the servo system and then fed back to the piezoelectric ceramic, and the cavity length of the passive mode-locked fiberlaser is adjusted through the piezoelectric ceramic, so that the repetition frequency of the passive mode-locked fiber laser is synchronized with an external signal source. The frequency synchronization passive mode-locked fiber laser is simple and compact in structure, large in synchronous frequency adjustable range and suitable for the fields of precision machining, frequency calibration, coldatoms and the like.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a frequency-synchronized passive mode-locked fiber laser and a method for realizing frequency synchronization. Background technique [0002] Due to the characteristics of ultrashort pulse and high peak power, femtosecond lasers have important application prospects in the field of micro-precision processing, especially a femtosecond laser whose frequency is synchronized with an external signal source can make micro-precision processing become More refined and efficient. At present, there are mainly two ways to realize femtosecond lasers: active mode-locking and passive mode-locking. For active mode-locking femtosecond lasers, the repetition frequency of the femtosecond laser can be changed by changing the modulation frequency of the electrical signal, so that the synchronization of the laser can be achieved. The femtosecond laser is synchronized with the external signal sour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/101H01S3/11H01S3/13
CPCH01S3/067H01S3/10H01S3/101H01S3/1115H01S3/13
Inventor 万威何飞陈抗抗陈正泽邹锶
Owner WUHAN YANGTZE SOTON LASER CO LTD
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