Page 170 - Tunable Lasers Handbook

4 CO, Isotope Lasers and Their Applications 149

TABLE 16 Small-Signal Gain Coefficients a, and Saturation Parameters I, for a
W-WW-1W-Xe Mixturea
L
Band Transition a. (8 cm-1 or m-1) Z, (W7-cm-2) a0& (W-cm-3)

0.55 28 0.15
0.61 35 0.22
0.61 38 0.25
0.61 36 0.22
0.53 21 0.13

0.52 25 0.13
0.57 30 0.17
0.56 32 0.18
0.51 33 0.17
0.34 25 0.11

0.23 7.7 0.018
0.26 8.4 0.022
0.26 8.7 0.023
0.25 7.2 0.018
0.21 5.6 0.0 12

0.21 1.6 0.010
0.23 5.4 0.012
0.23 6.0 0.014
0.23 4.8 0.01 1
0.19 2.1 0.004
OReprinted with permission from Freed era!. [125]. 0 1982 EEE.

12. LASER DESIGN

All of the experimental results described in this chapter that were carried
out at MIT Lincoln Laboratory were obtained with ultrastable lasers and ampii-
fiers that were designed and constructed at MIT Lincoln Laboratory. Houwer.
copies of the designs were also sent to qualified researchers outside the MIT
community. and many of the lasers were reproduced elsewhere.
The most important aspects of the design were based on the He-Ne laser
design of Javan et 01. [128], which demonstrated superb frequency stability
[129]. Departure from the original He-Ne designs occurred in three stages
between 1966 and 1968 as described in [56]. Additional details on the evolution