Generation of trains of ultrashort (100-ps) pulses continuously tunable over the interval 307.6–308.6 nm by a long-pulse XeCl laser
| Autor: | S V Efimovskiĭ, Sergei V Kurbasov, Yu I Karev, A. K. Zhigalkin |
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| Rok vydání: | 1993 |
| Předmět: |
Materials science
business.industry Ti:sapphire laser Statistical and Nonlinear Physics Laser Population inversion Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Pulse (physics) Optics Multiphoton intrapulse interference phase scan Mode-locking law Optical cavity Electrical and Electronic Engineering business Fabry–Pérot interferometer |
| Zdroj: | Quantum Electronics. 23:947-953 |
| ISSN: | 1468-4799 1063-7818 |
| Popis: | A long-pulse XeCl laser has been developed which is capable of generating, under conditions of active mode locking, trains of ultrashort pulses 100 ps long which are continuously tunable over the interval 307.6–308.6 nm. The number of pulses in a train ranges up to 60. With an intracavity Fabry–Perot etalon, pulses which are approximately spectrally bounded are obtained. The length of the ultrashort pulses has been studied as a function of the length of the laser cavity and the order of the pulse in the train. There is a significant increase in the length of the ultrashort pulses in comparison with the minimum length as the cavity length is varied by more than 1 mm. The minimum length attainable (100 ps) is not determined by the lifetime of the population inversion in the laser (0.5 μs). It is instead determined by other factors, most significantly the time variation of the pump. Ways to further improve the stability and reduce the length of the ultrashort pulses generated by long-pulse XeCl lasers (τ>0.5 μs) under mode-locking conditions are discussed. The operation of such lasers with mode locking with an attached nonlinear cavity is analyzed. Numerical calculations show that pulses shorter than 10 ps can be achieved in this case. |
| Databáze: | OpenAIRE |
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