Generation of double femtosecond pulses by using two transmissive gratings.

Double femtosecond laser pulses are usually generated by using a Michelson structure. We propose a novel and simple device by using two high-density transmissive gratings for generation of double pulses and conversion between single and double laser pulses by shifting one of the two gratings by a quarter period. The apparatus has the advantages of compact volume, simple structure, and convenience in manipulation. Experimental outputs of the double laser pulses are well verified in experiment, which can be properly explained by numerical simulation with the rigorous coupled-wave theory. This structure provides an interesting approach for generation of double pulses and conversion between single and double laser pulses for practical applications of the femtosecond laser.

[1]  Changhe Zhou,et al.  Splitting of femtosecond laser pulses by using a Dammann grating and compensation gratings. , 2005, Journal of the Optical Society of America. A, Optics, image science, and vision.

[2]  Oscar E. Martínez,et al.  Grating and prism compressors in the case of finite beam size , 1986 .

[3]  Ulrike Fuchs,et al.  Measuring the spatiotemporal electric field of tightly focused ultrashort pulses with sub-micron spatial resolution. , 2008, Optics express.

[4]  Changhe Zhou,et al.  Ultrafast double pulses ablation of Cr film on glass , 2008 .

[5]  Dongjoo Lee,et al.  Experimentally simple, extremely broadband transient-grating frequency-resolved-opticalgating arrangement. , 2007, Optics express.

[6]  Ulrike Fuchs,et al.  Measuring the spatiotemporal electric field of tightly focused ultrashort pulses with submicron spatial resolution , 2009, LASE.

[7]  I. Walmsley,et al.  Characterization of ultrashort electromagnetic pulses , 2009 .

[8]  Changhe Zhou,et al.  Generation of double pulses in-line by using reflective Dammann gratings , 2008 .

[9]  Changhe Zhou,et al.  Beam splitting of low-contrast binary gratings under second Bragg angle incidence. , 2008, Journal of the Optical Society of America. A, Optics, image science, and vision.

[10]  Changhe Zhou,et al.  Dammann SHG-FROG for characterization of the ultrashort optical pulses. , 2005, Optics express.

[11]  Rick Trebino,et al.  The general theory of first-order spatio-temporal distortions of Gaussian pulses and beams. , 2005, Optics express.

[12]  A. Semerok,et al.  Ultrashort double pulse laser ablation of metals , 2004 .

[13]  Rick Trebino,et al.  Spatial chirp in ultrafast optics , 2004 .

[14]  周常河,et al.  Double-line-density gratings structure for compression and generation of double femtosecond laser pulses , 2007 .

[15]  K. Eikema,et al.  Ultrafast double-pulse parametric amplification for precision Ramsey metrology. , 2008, Optics express.

[16]  Changhe Zhou,et al.  Three-port beam splitter of a binary fused-silica grating. , 2008, Applied optics.