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1 Micron Optical Coatings
Pulsed Dual Enhanced Silver for 1.06μm and 0.6328μm - PDES
*Damage threshold certification per batch is available for a fee.
Application
The Pulsed Dual Enhanced Silver (PDES) coating was developed specifically for applications using pulsed YAG lasers where a moderate level of damage threshold is required. Thecoating reflectivity has been optimized for 1.06μm and 0.6328μm wavelengths.
The PDES was designed for an angle of incidence (AOI) of 45 ; however, the reflectivity trace for both wavelengths is relatively flat over a large range of AOI.
The typical substrate material for the PDES is silicon, but fused silica is an alternative material where mechanical stiffness is less critical.
One of the most common commercial applications for the PDES coating is YAG laser marking. PDES coated galvo mirrors have superior efficiency due to their high reflectivity at 1.06μm. Thevisible reflectivity permits the system tobe easily aligned, and provides a secondary level of safety to alert the user when the beam is on.
Spectral Performance
1.064μm 99.5% @ 45 R-Pol 0.6328μm 95.0% @ 45 R-Pol 0.63-0.67μm > 80.0% @ 45 R-Pol
Typical Damage Threshold*
<= 5J/cm2 @ 100ns @ 1.064μm
Theoretical Performance of PDES for 1064nm and 632.8nm
99.0%
99.2%
99.4%
99.6%
99.8%
100.0%
30 40 50 60
Angle of Incidence
Ref
lect
ion
S-pol
P-pol
Theoretical Performance of PDES for 1064nm and 632.8nm
85%
90%
95%
100%
0.5 0.75 1 1.25 1.5
Wavelength, μm
Ref
lect
ion
S-pol
P-pol
rev. June 2007 PDES101064633
1 Micron Optical Coatings
High-Efficiency Anti-Reflective (NAR) Coating on Zinc Sulfide MultiSpectral (ZnS MS) for NIR, 1.03μm, 1.064μm, 1.07μm
Application
This coating is designed to give low reflectance, low absorption and high transmittance. Especially useful for high power laser systems. This coating on ZnS MS will provide advantages over fused silica in high power applications due to its higher thermal conductivity and refractive index.
Spectral Performance
Transmission when measured on a 3mm thick ZnS MS substrate coated on both surfaces with the NAR coating.
T >= 99.4% at 1μm (typically ~ 99.6%)
Reflection from a single surface when coated with the NAR coating.
R <= 0.2% per surface
Absorption for a 3mm thick ZnS MS substrate coated on both surfaces with the AR coating.
A <= 0.05% per surface
HigTra
h-Efficiency Anti-Reflective Coating on ZnS MS for 1.064μm nsmission vs. Wavelength
95%
96%
97%
98%
99%
100%
0.9 1 1.1 1.2
Wavelength, μm
Tran
smis
sion
High-Efficiency Anti-Reflective Coating on ZnS MS for 1.064μm Reflection vs. Wavelength
0.0%
0.5%
1.0%
1.5%
2.0%
2.5%
0.9 1 1.1 1.2
Wavelength, μm
Ref
lect
ion
Environmental Performance
This coating is designed to meet durability requirements for the following MIL specifications:
Adhesion MIL-C-48497 MIL-C-675C
Humidity MIL-C-48497 MIL-C-675C
Moderate MIL-C-48497 Abrasion MIL-C-675C
rev. June2007 VAR04001064
1 Micron Optical Coatings
Zero Phase Shift Total Reflector (NTR) Coating for NIR, 1.03μm, 1.064μm, 1.07μm
NTR for 1.064μmPhase Shift vs. Wavelength
-10
-5
0
5
10
1 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.1
Wavelength ,μm
Phas
e Sh
ift
Application
Zero Phase Shift Total Reflector (NTR) coating for silicon or copper substrates.
Designed as a high reflective zero phase shift coating to be used as a beam bender before or after a 90phase retarder to reduce phase shiftchanges in beam delivery systems.
Spectral Performance
R >= 99.5% at 1.064μm, 45 AOIR >= 80.0% at 0.6328μm, 45 AOI
Phase Shift 0 ± 4.0
This coating can be designed for other NIR wavelengths and angles.
NTR for 1.064μm Phase Shift Vs. AOI
-5
0
5
10
0 10 20 30 40 50
Angle of Incidence (°)
Phas
e Sh
ift
60
rev. June 2007 TRZ608101064
1 Micron Optical Coatings
90° Reflective Phase Retarder (NRPR) Coating for NIR, 1.03μm, 1.064μm, 1.07μm
Application
High reflective 90 NRPR is a coating forsilicon and copper substrates.
Introducing a quarter-wave 90 NRPRinto the beam delivery path eliminateskerf variations by converting linearpolarization to circular polarization. Circular polarization consists of equal amounts of S-polarization and P-polarization for any orientation of thebeam. Therefore all axes encounter thesame composition of polarization, andmaterial is removed uniformly regardlessof cut direction.
The NRPR must be used where a linearly polarized beam is oriented such that the plane of polarization is 45 to the plane of incidence and strikes the NRPRat 45 to the normal. The reflected beamis circularly polarized.
Spectral Performance
R >= 98.0% at 45 AOI
Phase Shift 90 ± 3.0
1/4 NRPR for 1.064μm Phase shift Vs. Wavelength
50
60
70
80
90
100
1 1.02 1.04 1.06 1.08 1.1
Wavelength, μm
Phas
e Sh
ift, d
egre
es
1/4 NRPR for 1.064μm Phase shift Vs. AOI
60
65
70
75
80
85
90
95
105
110
40 41 42 43 44 45 46 47 48 49 50
Phas
eSh
ift,d
egre
es
100
45°
45°
Angle of Incidence (*)Angle of Incidence ( )
rev. June 2007 RPRG4080107A