GRAZING INCIDENCE GRATINGS Grazing incidence is a simple and inexpensive optical configuration that can tune and increase the resolution of a dye laser. A holographic grating, functioning as an end reflector in a dye laser cavity, is positioned so that laser radiation strikes the grating almost perpendicular to the grating normal. As the angle of incidence approaches 89 degrees, a relatively large area of the grating is illuminated by the laser beam, increasing angular dispersion and resolving power significantly. The sizes of the grazing and mirror (12.7 x 50.8 mm) are optimized for grazing incidence. The grating is fixed and tuning is achieved by rotation of the mirror. The laser beam is diffracted twice in grating incidence, resulting in a two fold increase in resolution. Low grating efficiency is characteristic of the grazing incidence configuration but is compensated for by the high gain of the dyes used.
REPLICATED HOLOGRAPHIC GRATING (12.7 x 50.8 mm)
GROOVES/mm
BLAZE λ (nm)
NORMAL (TF)
UTF-P (Pulsed)
UTF-CW (Continuous)
1200
Vis
5-2401
5-2406
5-2410
1800
Vis
5-2402
5-2407
5-2411
2400
Vis
5-2403
5-2408
5-2412
3600
UV
5-2404
5-2409
5-2413
PRICE ($)*
129.00
159.00
199.00
MIRROR: Used in conjunction with grazing incidence gratings (above) for double pass high resolution tuning of dye lasers.
