Page 44 - Tunable Lasers Handbook

2 Narrow-linewidth Laser Oscillators 25

and the losses at the exit surface are

Here R,,,n and R2.n2 are the well-known Fresnel equations for either s- or p-
polarization [40].
The efficiency of diffraction gratings depends on parameters such as wave-
length. angle of incidence, and polarization. As discussed by Duarte and Piper

d

f
FIGURE 7 (continued)