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Laser Optical Coatings


Laser Output Couplers
Dielectric Laser HR Flat Mirrors
Flat Harmonic Separators

Laser Output Couplers

High energy Nd:YAG laser output couplers (OC) are manufactured using high purity fused silica substrates and ultrahard dielectric coatings. These mirrors have been specifically designed to withstand high energy pulses and have a very high damage threshold. Meticulous production procedures guarantee they will withstand fluences of laser intensities greater than 5 J/cm2 at 1064 nm. The coatings are highly durable and will withstand repeated cleaning. We offer Nd:YAG couplers for the fundamental 1064nm, frequency-doubled 532nm and frequency-tripled 354.7 nm laser lines at either 0° or 45° incident angle. Reflectivity is greater than 99.9% for s-polarization and greater than 99.2% for p-polarization. These couplers are available in 12.7mm to 50.8 mm diameters at 1064nm, 1053nm , 1047nm and 532nm .

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Substrate Material: BK7 grade A fine annealed optical glass
Diameter:  +0.0mm/-0.2mm
Thickness: ± 0.2mm
Parallelism for Plano-plano of Output Coupler < 30 arc sec
Surface Quality: 20-10 scratch-dig
Surface Figure: l /8
Clear Aperture >80%
Coating: Partially reflective coating on S1
Reflection: ± 2% for R<95%, ± 1% for R>95%@1064nm, 1053nm and 1047nm
  (Standard R=50%, 60%, 70%, 80%, 85%, 90%, 94% or 98%)
AR Coating on S2: R<0.2% @1064nm, 1053nm and 1047nm
Damage Threshold: 500MW/cm2 CW, 5 J/cm2 at 1064nm, 10ns and 10Hz pules

 

Dielectric Laser HR Flat Mirrors

ALL-dielectric laser mirrors (normal incidence) are precision flat mirrors coated with an all-dielectric mirror coating for maximum reflectance at specific laser wavelengths for 0° and 45° incidence. Since the coatings are angle sensitive, the mirrors are used at 0° ±5° incidence angle and 45° ±15°. These coatings are durable and are cleanable using normal laboratory methods.

Substrate Material: BK7 grade A, fine annealed optical glass
Diameter:  +0.0mm/-0.2mm
Thickness: ± 0.2mm
Parallelism for Flat Mirror < 1 arc minute
Surface Quality: 20-10 scratch-dig
Surface Figure: l /8
Clear Aperture >85%
Coating:

HR coating on S1, R>99.7%@1064nm, 1053nm or 1047nm Uncoated on S2

Damage Threshold: 500MW/cm2 CW, 5 J/cm2 at 1064nm, 10ns, 10Hz pules









 

Flat Harmonic Separators

Harmonic beamsplitters are designed to separate Nd:YAG laser harmonics after frequency multiplication. These optics are precision polished, made of select grade fused silica coated with hard multilayers for very high damage threshold. A damage resistant antireflection coating for the transmitted harmonic is applied to the back surface to further improve transmission. Each coating design has been tested to guarantee reliable operation with high fluence Nd:YAG lasers.

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Substrate Material: UV-fused silica
Diameter:  ± 0.2mm
Thickness: ± 0.2mm
Parallelism < 1 arc minute
Flatness: λ/10
Surface Quality: 20-10 scratch-dig
Clear Aperture >80%
Angle of Incidence: 0° or 45°
AR Coatings: R < 0.2%
Reflectivity & Transmission: (1064nm & 532nm incidence)
Surface Figure: I. Rave > 99.5%@1064nm & Tave>85%@532nm
  II. Rave > 99.5%@532nm & Tave >95%@1064nm
 

HR coating on S1, R>99.7%@1064nm, 1053nm or 1047nm Uncoated on S2

Damage Threshold: 500 MW/cm2 CW, 5 J/cm2 with 1-100 nsec pulses at 1064 nm ,
  200MW/cm2 CW, 2.5 J/cm2 with 1-100 nsec pulses at 532 nm

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