A novel confocal optical pulse stretcher for laser pulses |
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Authors: | R Khare PK Shukla GK Mishra C Mukherjee S Talwar VK Dubey P Saxena JK Mittal |
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Institution: | aLaser Systems Engineering Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India |
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Abstract: | We present an analytical and experimental study of a novel confocal optical pulse stretcher (COPS). The simple and passive pulse stretcher consists of two concave mirrors and a scraper beam-splitter and its optical configuration ensures a perfect spatial overlapping of laser pulses at the beam-splitter. The pulse stretcher is compact and suitable for laser pulses of large divergences. The confocal optical pulse stretcher is demonstrated on a pulsed copper vapour laser to convert a 40 ns (1/e2 % points) pulse into a 55 ns with reduction of peak power by a factor of 1.375 without loss of pulse energy. |
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