Page 28 - Tunable Lasers Handbook

2 Narrow-tinewidth Laser Oscillators 11

I

b (+9 -9 +, -)
Gain t

Grating

C
Gain \ Grating

/

FIGURE 2 Class 11 oscillators. (a) An MPL oscillator using a multiple-prism beam expander in
a (+,+,+,-) configuration. (b) An MPL oscillator using a multiple-prism beam expander in a (+,-,+,-)
configuration. (c) An HMPGI oscillator. These oscillators incorporate a polarizer output coupler
rather than a conventional mirror (this is an optional feature).