Tunable-wavelength mode-locked Nd-glass laser with instant recording of temporal and spectral parameters

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Abstract
A tunable‐wavelength mode‐locked Nd‐glass laser operating in a single transverse mode configuration has been developed. The intracavity bandwidth of the laser is narrowed by using eight highly dispersive Abbe prisms and a resonant reflector. A single bandwidth‐limited pulse is isolated from the train, its duration being 30 psec and its linewidth being 0.8 Å. The wavelength can be tuned over a range of 80 Å between 10 580 and 10 660 Å. The pulse characteristics measurements are performed by using a streak camera and a spectrograph, both connected to a TV system giving immediate display of the shape, duration, spectral width, and wavelength of each laser shot.