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Characterization of laser-diode end-pumped intracavity frequency doubled, passively Q-switched and mode-locked Nd:YVO4 laser |
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| Authors: | P K Mukhopadhyay M B Alsous K Ranganathan S K Sharma P K Gupta A Kuruvilla T P S Nathan |
| Institution: | a Department of Atomic Energy, Solid State Laser Division, Center for Advanced Technology, Indore 452013 MP, India;b Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, USA;c Biomedical Applications Section, Center for Advanced Technology, Indore, MP, India |
| Abstract: | Simultaneous Q-switching and mode-locking in a laser-diode end-pumped intracavity frequency doubled Nd:YVO4/KTP green laser using Cr4+:YAG saturable absorber is experimentally demonstrated. The influence of the initial transmission (T0) of the Cr4+:YAG crystal on the Q-switched mode-locked green pulses as well as on the average green power is characterized by using Cr4+:YAG crystal with various T0. The effect of T0 on the pulse build-up time in intracavity second harmonic configuration is theoretically investigated. It was found that the depth of modulation for the mode-locked pulses is greatly improved at the second harmonic wavelength as compared to that for the fundamental wavelength. The average pulse duration of the individual mode-locked pulse for the second harmonic beam measured to be less than 500 ps with a repetition rate of 400 MHz. |
| Keywords: | Mode-locking Passively Q-switched Nd:YVO4 Cr4+:YAG Intracavity second harmonic |
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