Page 474 - Tunable Lasers Handbook

434 Paul Zorabedian

1 .OVNertical Div 500~s/Horizontal Div

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b

1330.0 1325.0 1320.0
Equivalent Wavelength (nm)
FIGURE 5 1 Swept-wavelength measurements of AOTF transmittance characteristics: (a) Crys-
tal Technology filter driven at 88.5 MHz. (b) Matsushita filter driven at 68.54 MHz. (Reproduced
with permission from Zorabedian [46]. 0 1995 IEEE.)

Dichroic

prism pair

FIGURE 5 2 Grating-tuned extended-cavity laser containing a quasi-phase-matched KTP wave-
guide for intracavity frequency doubling. (Reproduced with permission from Risk et a1 [162] and
the American Institute of Physics.)

crystal can be placed inside an ECL to take advantage of the higher circulating
intracavity power and the wavelength control provided by the tuning element.
Intracavity second harmonic generation has been performed in grating ECLs
using angle-phase-matched a-iodic acid (HIO,) bulk crystals [ 1611 and quasi-
phase-matched, periodically poled waveguides in KTP substrates [ 1621 (Fig. 52).
Ten milliwatts of 532-nm light has been generated from a Nd:YVO, laser inter-
nally doubled with a KTP crystal and pumped with 55 mW from an interference-
filter-controlled quasi-degenerate ECL at 809 nm [ 1631 (Fig. 53).