Pramana | |
A comparative study on dual colour soft aperture cascaded second-order mode-locking with different nonlinear optical crystals | |
Satya Pratap Singh2  Prasanta Kumar Datta12  Sourabh Mukhopadhyay1  Kamal Hussain2  Shouvik Mukherjee2  Shyamal Mondal2  Aditya Date2  | |
[1] Department of Physics, Jhargram Raj College, Jhargram 721 507, India$$;Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India$$ | |
关键词: Mode-locking; ultrafast processes; optical susceptibility; frequency conversion; dynamics of nonlinear optical systems.; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
A comparative study in terms of optimized output power and stability is made on cascaded second-order nonlinear optical mode-locking with KTP, BBO and LBO crystals for both 1064 nm and 532 nm. Large nonlinear optical phase shift achieved in a non-phase-matched second harmonic generating crystal, is transformed into amplitude modulation through soft aperturing the nonlinear cavity mode variation at the laser gain medium to mode-lock a Nd:YVO4 laser. The laser delivers stable dual wavelength cw mode-locked pulse train with pulse duration 10.3 ps and average power of 1.84 W and 255 mW at 1064 nm and 532 nm respectively for the optimum performance in type-II KTP crystal. The exceptional stability achieved with KTP is accounted by simulating the mode-size variation with phase mismatch.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040498872ZK.pdf | 560KB | download |