Page 206 - Tunable Lasers Handbook

184 F. J. Duarte
a

Coaxial flashlamp dye laser

b

FIGURE 8 Schematics of (a) flashlamp-pumped MPL oscillator and (b) HMPGI oscillator.
(Reprinted with permission from Duarte et a/. [72] and Elsevier Science.)

In this regard, the narrow-linewidth emission pulse must be synchronized to
arrive during the buildup period of the forced-oscillator pulse. In the case of
forced oscillators using unstable resonator optics, the magnification of the optics
must be optimized relative to the beam dimensions of the master oscillator to
completely fill the active volume of the forced oscillator. Also. the injection beam
should be aligned exactly for concentric propagation along the optical axis of
the forced oscillator. The performance of flashlamp-pumped master-oscillator/
forced-oscillator systems is listed in Table 10. In addition to those results, energy
gains as high as 478 have been reported for an MPL master oscillator and a
forced oscillator with a magnification factor of 5 [62].
The use of cw dye laser oscillators as injection sources of amplification
stages utilizing ring cavity configurations is discussed by Blit et al. [78] and Tre-
hin et a/. [79].

4. cw LASER-PUMPED DYE LASERS

The cw dye lasers span the spectrum from -370 to -1000 nm. Frequency
doubling extends their emission range into the 260- to 390-nm region. An impor-
tant feature of cw dye lasers has been their ability to yield extremely stable
emissions and very narrow linewidths. These qualities have made cw dye lasers