Abstract
A high beam quality hundred picoseconds single-longitudinal-mode (SLM) laser is demonstrated based on stimulated Brillouin scattering (SBS) pulse compression and aberration compensation. Flash-lamp-pumped Q-switched Nd3+:Y3Al5O12 (Nd:YAG) SLM laser with Cr4+:Y3Al5O12 (Cr4+:YAG) as a saturable absorber is used as the seed source. By combining master-oscillator-power-amplifier (MOPA), a compact single-cell with FC-770 as working medium is generated as pulse compressor. The 7.8 ns SLM laser is temporally compressed to about 450 ps, and 200 mJ energy is obtained at 1064 nm without optical damage. The energy stability is better than 3% with beam quality factor M2 less than 1.8, which makes this laser system an attractive source for scientific and industrial applications.
Highlights
Ultrashort lasers with high energy and high power intensity have wide application prospects, such as laser induced plasma (LIP), space debris detection, laser peening, nonlinear optics, spectroscopy, and laser processing [1,2,3,4,5]
In the field of laser pulse compression, stimulated Brillouin scattering (SBS) is an effective method to been widely used in phase stabilization, pulse compression, beam combination and ultrafast pulse compress a long pulse for its high energy reflectivity and high compression ratio
We present a compact high beam quality hundred picoseconds laser system based
Summary
Ultrashort lasers with high energy and high power intensity have wide application prospects, such as laser induced plasma (LIP), space debris detection, laser peening, nonlinear optics, spectroscopy, and laser processing [1,2,3,4,5]. In the field of laser pulse compression, SBS is an effective method to been widely used in phase stabilization, pulse compression, beam combination and ultrafast pulse compress a long pulse for its high energy reflectivity and high compression ratio. By SBS pulse compression, Stokes light with pulse width of few and sub- nanoseconds were designed including taped waveguide, one-cell geometry, oscillator amplifier, compact two cell, can be obtained [14,15,16]. This ratio that make it unsuitable for practical application [17,18]. A short focal lens ensure the amplification effect, length of the SBS cell in Figure 2a,b should be no less than shortest is adopted to obtain higher reflectivity with less sensitivity to injected energy.
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