研究目的
Investigating the high-efficiency, high-gain, all-fibered double-pass configuration for low-duty-cycle temporally shaped nanosecond pulse amplification.
研究成果
The proposed double-pass amplifier configuration achieves over 50-dB gain at a pump power of 800 mW, demonstrating higher efficiency and improved optical signal-to-noise ratio compared to Faraday-based structures. The design effectively avoids polarization mode dispersion, making it suitable for high-power amplifier systems.
研究不足
The study focuses on low-duty-cycle nanosecond pulses and may not be directly applicable to other pulse regimes without further optimization.
1：Experimental Design and Method Selection:
The study proposes a high-gain fiber amplifier at 1053 nm with a double-pass configuration, comparing it to Faraday-based double-pass structures.
2：Sample Selection and Data Sources:
The experiment uses a 1053-nm, 1-Hz nanosecond pulse as the input signal.
3：List of Experimental Equipment and Materials:
Includes fibered polarized beam splitters, polarization-maintaining fiber, and a 976-nm laser diode for pumping.
4：Experimental Procedures and Operational Workflow:
The setup involves amplifying the signal in a double-pass configuration, studying the effects of fiber length and insertion loss on efficiency.
5：Data Analysis Methods:
The gain and optical signal-to-noise ratio are measured to evaluate the amplifier's performance.
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energy meter
PD10-pJ-C, PE9-ES-C
Ophir
Used to monitor the pulse energy.
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oscilloscope
DSO93004 L
Agilent
Used to obtain the pulse temporal profile.
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photodetector
DET08CFC
Thorlabs
Used with the oscilloscope to measure the pulse temporal profile.
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fiber spectrophotometer
HR4000
Ocean Optics
Used to measure the spectrum of the input and output signals.
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fibered polarized beam splitter
Allows for the orthogonal propagation of forward and the backward signals on the same polarization-maintaining fiber.
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polarization-maintaining fiber
Used to avoid polarization mode dispersion in the amplifier.
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976-nm laser diode
Used for pumping the fiber amplifier.
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Yb-doped double-cladding fiber
PLMA-YDF-10/125-VIII
Nufern
Used as the active fiber in the amplifier.
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pump combiner
ARF Company
Used for cladding pumping the active fiber with minimal insertion loss.
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bandpass filter
4-nm
Used to remove most of the ASE from the signal.
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isolator
Used to block the backward ASE to improve the OSNR.
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