研究目的
Investigating the frequency expansion of efficient passively Q-switched orthogonally-polarized dual-wavelength laser.
研究成果
The study successfully demonstrated the frequency expansion of PQS orthogonally-polarized dual-wavelength lasers with high output power and reduced timing jitter. This advancement has potential applications in terahertz generation and other fields requiring high peak power dual-wavelength lasers.
研究不足
The inherent gain competition from single laser crystal causes output fluctuation and pulse timing jitter. The simultaneity between the first pulses of dual-wavelength lasers was difficult to maintain stable.
1：Experimental Design and Method Selection:
The study utilized a double-resonator configuration with two Nd:YLF crystals or one Nd:YLF and one Nd:YAG crystal to generate orthogonally-polarized dual-wavelength lasers. The dynamic of pulse synchronization was analyzed theoretically.
2：Sample Selection and Data Sources:
The samples included Nd:YLF and Nd:YAG crystals, with specific dimensions and doping concentrations. Data was collected on output powers, pulse durations, and spectral properties.
3：List of Experimental Equipment and Materials:
Equipment included an 808 nm fiber-coupled continuous-wave laser diode, polarizing beam splitter, lenses, Cr4+:YAG composite crystal as a saturable absorber, and various mirrors and polarizers.
4：Experimental Procedures and Operational Workflow:
The setup involved adjusting pump power differences to synchronize dual-wavelength laser pulses, with measurements taken on output characteristics and temporal profiles.
5：Data Analysis Methods:
Output characteristics were analyzed using a spectrometer, fast photodiode, and digital oscilloscope, with beam quality factors measured by a laser beam analyzer.
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fast photodiode
DET08CL/M
Thorlabs
Monitoring the temporal profile of the output pulse
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digital oscilloscope
DSO90604A
Agilent
Recording the temporal profile of the output pulse
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spectrometer
Omni-λ300
Zolix
Registering the spectral properties of the output laser
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fiber-coupled continuous-wave laser diode
Pump source for the laser system
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Cr4+:YAG composite crystal
Saturable absorber for Q-switching
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laser beam analyzer
M2-200s
Spiricon, Inc.
Recording the spatial characteristics of the laser beam
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