Structure of picosecond pulses of a Q-switched and mode-locked diode-pumped Nd:YAG laser

The pulse duration of a diode-pumped Nd: YAG laser, in which Q-switching with mode-locking (QML regime) is achieved using a spherical mirror and a travelling-wave acousto-optic modulator, is directly measured with a streak camera. It is found that the picosecond pulses can have a non-single-pulse st...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2015-12, Vol.45 (12), p.1117-1120, Article 1117
Main Authors: Donin, V I, Yakovin, D V, Gribanov, A V
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
EXCITATION
LASER RADIATION
Lasers
MODE LOCKING
MODULATION
Modulators
Neodymium
NEODYMIUM LASERS
OSCILLATIONS
Picosecond pulses
Pulse repetition rate
PULSES
PUMPING
Q-SWITCHING
Quantum electronics
RELAXATION
Semiconductor lasers
SPHERICAL CONFIGURATION
STREAK CAMERAS
TRAVELLING WAVES
YAG lasers
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Summary:The pulse duration of a diode-pumped Nd: YAG laser, in which Q-switching with mode-locking (QML regime) is achieved using a spherical mirror and a travelling-wave acousto-optic modulator, is directly measured with a streak camera. It is found that the picosecond pulses can have a non-single-pulse structure, which is explained by excitation of several competing transverse modes in the Q-switching regime with a pulse repetition rate of 1 kHz. In the case of cw mode-locking (without Q-sw itching), a new (auto-QML) regime is observed, in which the pulse train repetition rate is determined by the frequency of the relaxation oscillations of the laser field while the train contains single picosecond pulses.
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2015v045n12ABEH015818