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Dual Wavelength Waveplate
Dual Wavelength Waveplates are THG-PR polarization rotators and used to manage the
polarizations of laser beams to obtain maximum conversion efficiency
of third harmonic generations (THG), i.e., 1064 nm + 532 nm > 355
nm.
Generally, type I frequency-doubler (oo-> e) +
type II frequency-tripler ( oe-> e) will be the best design for
THG which needs no polarization rotator. However, when a type II KTP
crystal is used as frequency-doubler and type II LBO as
frequency-tripler (see the Figure), the laser polarizations coming
out from KTP are not optimized for THG. How to change it into its
optimum? OP-Unite THG-PR polarization rotator can do it!
Common ¦Ë/2 wave phase retardation plate could only
rotate the polarization of 532 nm to a specific angle. However, the
linear polarization of 1064 nm will be distorted to be elliptical.
The THG-PR rotator is specially designed to maintain the linear
polarization of 1064 nm (¦Ë plate) and change simultaneously 532 nm
(¦Ë/2 plate) to the angle you need. The THG-PR can be applied to:
1. Type II (SHG) + Type II (THG)
2. Type I (SHG) + Type
I (THG)
3. Type II (SHG) + Type I (THG) |
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General Specifications |
Parameter |
Commercial Grade |
Substrate Material |
Crystal Quartz |
Dimension Tolerance |
+0.0/-0.2mm |
Wavefront Distortion |
¦Ë/8 @632.8nm |
Retardation Tolerance |
¦Ë/100 (typical) |
Wavelength Range |
240-2100nm |
Parallelism |
< 1 arc second |
Surface Quality |
20-10 S/D |
| Standard Wavelength |
1064nm & 532nm |
AR/AR Coating
|
R<0.2% @1064nm (fundamental
wavelength)
R<0.5% @532nm (SHG wavelength)
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Dual Wavelength Waveplates Standard
Products:
¦µ (mm) |
¦Ë @1064nm & ¦Ë/2 @532nm |
¦Ë/2 @1064nm & ¦Ë @532nm |
Part No. |
Part No. |
10.0 |
OWP4110 |
OWP4310 |
12.7 |
OWP4112 |
OWP4312 |
15.0 |
OWP4115 |
OWP4315 |
20.0 |
OWP4120 |
OWP4320 |
Note: Other wavelengths within the range of 200-2300nm
are also available upon request.
Metal Mount is available upon
request. |
