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IR Laser Optics - Grazing Incidence Gratings
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.

 
Specifications
Grating:
Grooves per mm 1200, 1800, 2400 or 3600
Thickness 9.5 mm ± 0.5 mm
Resolution 50% to 90% of theoretical
         Efficiency at Grazing Incidence:
            Single Pass Approx. 24%
            Double Pass Approx. 4%
Mirror:
Coating - AlSiO
Thickness - 9.5 mm ± 0.5 mm

 

REPLICATED HOLOGRAPHIC GRATING (12.7 x 50.8 mm)
GROOVES/mm BLAZE  CAT. NO.  
1200 VIS 5-2401
1800 VIS 5-2402
2400 VIS 5-2403
3600 VIS 5-2404

PRICE ($)*

129.00

MIRROR: Used in conjunction with grazing incidence gratings (above) for double pass high resolution tuning of dye lasers.
SIZE CAT. NO. PRICE($)*  

12.7 x 50.8mm

5-2405

79.00

* Prices are in USD and are list prices only.
 
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