Continuously tunable dual-wavelength narrow-bandwidth fiber laser based on gain modulation of dispersive cavity
A dispersion-compensating optical fiber and dual-wavelength technology, which is applied to lasers, laser components, phonon exciters, etc., can solve problems such as complex structure, reduced system stability, difficulty in maintaining wavelength tuning accuracy and continuity, and achieve operational The effect of simplicity and simple structure
Active Publication Date: 2021-02-23
ZHEJIANG UNIV
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Problems solved by technology
A typical dual-wavelength fiber laser system often requires two filters to simultaneously select two wavelengths and stabilize the two wavelengths by adjusting the cavity loss, which complicates the structure to a certain extent and reduces the stability of the system
In addition, in this case, the tuning accuracy and continuity of the wavelength is difficult to maintain
Method used
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Embodiment 1
[0024] Such as Figure 4 As shown, the present invention proposes a continuously adjustable dual-wavelength narrow-bandwidth fiber laser based on gain modulation of the dispersion cavity, including: a semiconductor optical amplifier 1 modulated by a pulse current, an optical coupler 2 for coupling out intracavity laser light, Dispersion compensating optical fiber 3 for producing larger intracavity dispersion, first optical circulator 6 and second optical circulator 5 for guiding laser propagation, variable optical delay line 7 for laser cavity length adjustment and Fiber jumper for connecting to the laser cavity. All devices are connected via fiber optic interfaces. Optocoupler 2 h and i The port is the 80% output port, p and g The port is the 20% output port. A second optical circulator 5 allows light from the port e incident on and from the port d output, or from the port d incident on and from the port q shoot. The first optical circulator 6 allows light from the...
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The invention discloses a continuously adjustable dual-wavelength narrow-bandwidth fiber laser based on gain modulation of a dispersion cavity, belonging to the field of dual-wavelength narrow-bandwidth lasers. A continuously adjustable dual-wavelength narrow-bandwidth fiber laser based on gain modulation of a dispersion cavity, including: a semiconductor optical amplifier modulated by a pulse current, an optical coupler for coupling out intracavity laser light, and a dispersion compensation for generating intracavity dispersion The optical fiber, the second optical circulator and the first optical circulator used to guide the laser propagation, the variable optical delay line used for the adjustment of the laser cavity length and the optical fiber jumper used to connect the laser cavity; constitute a clockwise propagation resonator and a resonator propagating counterclockwise. This dual-wavelength narrow-bandwidth fiber laser can simultaneously respond to two wavelength regions of an object, and can be used in many fields such as optical sensing, optical communication systems, optical detection, and lidar.
Description
technical field [0001] The invention relates to a dual-wavelength fiber laser technology, and in particular provides a continuously adjustable dual-wavelength narrow-bandwidth fiber laser based on gain modulation of a dispersion cavity. Background technique [0002] The output laser spectrum of a dual-wavelength laser has two peaks, which can simultaneously respond to two wavelength regions of an object. In many fields such as optical sensing, optical communication systems, optical detection, and lidar, this feature can ensure that dual-wavelength lasers can perform twice as much as single-wavelength lasers without significantly increasing material and space costs. People also convert the dual-wavelength output into corresponding microwave and terahertz waves through beat frequency and optical nonlinearity. Therefore, dual-wavelength lasers have good practical and research value. [0003] Fiber lasers have high beam quality, good environmental robustness, high power conver...
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IPC IPC(8): H01S3/067H01S3/08H01S3/10
CPCH01S3/067H01S3/06725H01S3/06754H01S3/06791H01S3/08H01S3/08004H01S3/0809H01S3/10007
Inventor 何赛灵杨雄
Owner ZHEJIANG UNIV