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Integrated phase biasing device and optical fiber laser employing same

A technology of fiber lasers and biasers, which is applied in lasers, laser components, phonon exciters, etc., can solve problems such as hindering applications, being susceptible to external interference, and high prices, and achieving the effect of reducing dependence

Active Publication Date: 2015-11-11
广东华快光子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with traditional Q-switched lasers, mode-locked lasers are difficult to self-start, susceptible to external interference, and high in price, which hinders their application
[0003] Nonlinear loop mirrors, saturable absorbers, and nonlinear polarization rotation are three mainstream mode-locking schemes for fiber lasers: the figure-of-eight mode-locked fiber laser composed of nonlinear loop mirrors is difficult to self-start, and requires the help of External adjustment, the output is non-polarization-maintaining pulse; the semiconductor saturable absorber in the saturable absorber mode-locked laser has a short service life, is easily damaged under high power, and the output power is low; other carbon-based saturable absorbers are easy to Qualitative change and loss of mode-locked start-up function
The above-mentioned nonlinear polarization rotation mode-locked fiber laser can provide very high average power, and use different mechanisms to form pulses to obtain a wide range of different repetition rates, picosecond or femtosecond pulse trains, but this mode-locking mechanism is Non-polarization-maintaining fiber is used, so external disturbances to the fiber will change the birefringence and nonlinear effects in the fiber, which will cause the laser to lose lock, so it is highly dependent on the environment
[0004] Among them, the 8-shaped fiber laser made of nonlinear loop mirror can provide mode-locked pulses, but the mode-locked laser generated by this method basically cannot achieve self-starting, because the loop is zero bias

Method used

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  • Integrated phase biasing device and optical fiber laser employing same
  • Integrated phase biasing device and optical fiber laser employing same
  • Integrated phase biasing device and optical fiber laser employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The mode-locked pulse generator 9 is a light emitting device, and the light emitting device includes a light emitting mirror 121, and the optical fiber emitting mirror 121 is connected with a bandpass filter 122, and the bandpass filter 122 is connected to a fiber coupler 8 connections.

[0032] Such as figure 2 As shown, the fiber coupler 8 has four ports, which are respectively the first bidirectional output port ①, the second bidirectional output port ②, the third bidirectional output port ③, and the output port ④. The mode-locked laser pulse is input to the fiber coupling The first bidirectional output port ① of the device 8 is output from the second bidirectional output port ② and the third bidirectional output port ③ respectively; the mode-locked laser pulse output from the second bidirectional output port ② passes through the wavelength division multiplexer 10 and the gain fiber are input to the first polarization-maintaining fiber 21 or the second polarization...

Embodiment 2

[0035] The mode-locked pulse generator 9 is a dispersion compensation device.

[0036] Such as image 3 As shown, the fiber laser includes: a fiber coupler 8, a wavelength division multiplexer 10, a phase biaser 11, and a dispersion compensation device; the dispersion compensation device replaces the band-pass filter and the light reflection mirror in Embodiment 1, which are included in the laser The self-consistent pulse width and spectral width can be realized in the process of pulse oscillation in the cavity.

Embodiment 3

[0038] The mode-locked pulse generator 9 is a spatial filtering device.

[0039] Such as Figure 4 As shown, the fiber laser includes: a fiber coupler 8, a wavelength division multiplexer 10, a phase biaser 11, and a spatial filter device; It also plays the role of reflection and filtering.

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Abstract

The invention discloses an optical fiber laser employing an integrated phase biasing device. A first two-way output end of an optical fiber coupler is connected with a mode-locked pulse generator; a second two-way output end of the optical fiber coupler is connected with a wavelength division multiplexer and a phase biasing device; the other end of the phase biasing device is connected with a third two-way output end of the optical fiber coupler; the phase biasing device comprises a package tube; a first polarization-maintaining optical fiber and a second polarization-maintaining optical fiber are respectively fixed at two ends of the package tube; a first collimating lens, a polarizer, a first faraday rotator, a birefringent wave plate, a second faraday rotator and a second collimating lens are sequentially arranged between light paths of the first polarization-maintaining optical fiber and the second polarization-maintaining optical fiber; the wavelength division multiplexer is connected with the first polarization-maintaining optical fiber or the second polarization-maintaining optical fiber; and the third two-way output end of the optical fiber coupler is connected with the first polarization-maintaining optical fiber or the second polarization-maintaining optical fiber, so that self-starting and long-term stable mode locking in the optical fiber laser are realized; and the dependency of the mode-locked optical fiber laser on the environment stability is lowered.

Description

[technical field] [0001] The invention relates to fiber laser technology, in particular to an integrated phase offset device and a fiber laser using the phase offset device. [Background technique] [0002] With the advancement of science and technology, ultrashort pulse fiber lasers are used more and more widely in scientific research and industrial processing, playing an irreplaceable role. Ultrashort pulse fiber laser has the characteristics of narrow pulse width and high peak power. However, compared with traditional Q-switched lasers, mode-locked lasers are difficult to self-start, susceptible to external interference, and high in price, which hinders their application. [0003] Nonlinear loop mirrors, saturable absorbers, and nonlinear polarization rotation are three mainstream mode-locking schemes for fiber lasers: the figure-of-eight mode-locked fiber laser composed of nonlinear loop mirrors is difficult to self-start, and requires the help of External adjustment, t...

Claims

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Application Information

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IPC IPC(8): H01S3/098H01S3/067
Inventor 张志刚李莹王爱民
Owner 广东华快光子科技有限公司