High Fidelity Picosecond Pulse Fiber Amplification With Inter-Stage Notch Filter

We propose and demonstrate a high fidelity narrowband picosecond pulse two-stage fiber amplification scheme with inter-stage filtering technique using fiber Bragg grating. This technique can not only narrow the bandwidth of the pulses broadened by self phase modulation in the first-stage fiber ampli...

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Bibliographic Details
Published inJournal of lightwave technology Vol. 38; no. 21; pp. 6082 - 6088
Main Authors Lu, Qiao, Ma, Jindong, Duan, Dian, Mao, Qinghe
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Accuracy
Amplification
Amplifiers
Bandwidth
Bragg gratings
Correlation
Doped fiber amplifiers
Fiber gratings
fiber nonlinear optics
Narrowband
Notch filters
optical filters
optical pulses
Oscillators
Phase modulation
Picosecond pulses
Pulse duration
Pulse measurements
Solid lasers
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Summary:We propose and demonstrate a high fidelity narrowband picosecond pulse two-stage fiber amplification scheme with inter-stage filtering technique using fiber Bragg grating. This technique can not only narrow the bandwidth of the pulses broadened by self phase modulation in the first-stage fiber amplifier, but also reshape the pulse temporal profile to near Gaussian shape, which reduces the spectral broadening slope of the pulses in the second-stage fiber amplifier and improves the narrowband fiber amplification ability. Using this technique, pulse energy of 10 nJ is achieved from a 0.2-nJ initial pulse by only using standard single mode fiber amplifiers while retaining 10 ps pulse width and 0.4 nm root mean square bandwidth. This technique may provide a simple and effective solution for high fidelity fiber amplification of low-energy ps seed pulse from fiber oscillators.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2020.3007069