
592 Laser-based measurements for time and frequency domain applications
FIGURE 8.14
Experimental setup for a spectroscopic test of the symmetrization postulate. MDL: mas-
ter diode laser; SDL: slave diode laser ; PZT: piezoelectric translator; OI: optical isolator;
DM: dichroic mirror ; PPLN: periodically po led LiNbO
3
crystal; PC: computer; LA: lock-in
amplifier; FP: Fabry-Perot cavity; F: Ge filter; PS: phase-scrambler; D: InSb detector.
band at 2 µm. According to the Born-Oppenheimer approximation, the total wave function
Ψ of a single molecule can be factor ize d in the form Ψ = ψ
e
ψ
υ
ψ
r
ψ
n
, where ψ
e
, ψ
υ
, ψ
r
, and
ψ
n
are the electr onic, vibrational,