Laser Mirrors & Windows

Optical Windows

1. Standard Part Numbers (BK7 Optical Glass)

2. Standard Part Numbers (UV Grade Fused Silica)

3. Standard Part Numbers (CaF2)

The above dimensions are our standard and others available upon request. Please feel free to contact us if you have any further questions or specific applications.

STJ Series Laser Optical Mirrors

1. BK7 Substrate Mirrors

The BK7 substrate comes with 1/2λ or 1/10λ surface accuracy. The common laser wavelength available includes 355nm, 532nm, 650nm, 808nm, 980nm, 1064nm, 1319nm, and 1550nm.The laser reflective coating with 0 to 45 degree AOI incident light makes use of the dielectric coating, offering high reflectivity of up to 99.9% as well as high damage threshold. This product is ideally suitable for beam deflection and folding applications. Custom design and fabrication are available upon request.

Ordering Information:

When ordering, please select a part number and then indicate (1) laser wavelength (XXXX in nm) and AOI (angle of incident light, A). The AOI is 0 or 45 degree in general. For example, STJ-1064-MB-50.8-4-45 is a K7 standard substrate 1064nm mirror with AOI 45 degree.

2. Fused Silica Substrate Mirrors

Our 1/2λ standard and 1/10λ high precision mirror substrates are exquisitely made with UV-grade synthetic fused silica. They have the features with outstanding thermal properties, exceptional purity, and excellent environmental durability for rigorous applications and are an ideal choice for interferometry, imaging systems, laser applications, optical path folding, as well as auto-collimation. Coated or uncoated mirrors are available. The second surface (S2) that is uncoated is highly polished to achieve the perfect finish as the optical windows.

The common laser wavelength that we provided includes 266nm, 355nm, 405nm, 468nm, 532nm, 650nm, 808nm, 980nm, 1064nm, 1319nm, and 1550nm. The laser reflective coating with 0 to 45 degree AOI incident light makes use of the dielectric coating, coming with high damage threshold and high reflectivity of up to 99.9%. This product is designed for beam reflection and folding applications. Furthermore, we can design coatings according to our customers' needs.

Ordering Information:

When ordering, please select a part number and then indicate (1) laser wavelength (XXXX in nm) and AOI (angle of incident light, A). The AOI is 0 or 45 degree in general. For example, STJ-1064-MJ-50.8-4-45 is a K7 standard substrate 1064nm mirror with AOI 45 degree.

HR Laser Line Mirrors

Dielectric HR Laser Line Mirrors provide higher reflectivity values than metallic mirrors, making them a perfect choice for high-performance laser systems. HR mirrors can be optimized for certain wavelength, angle of incidence and polarization. We design mirrors in-house to meet your desired specifications and provide high-performance optics. Every coating batch is tested to confirm reflectivity values. Mirrors can also be optimized for high LIDT and LIDT measurements can be conducted upon request.

Features

• HR laser line coatings (HR) highly reflect at wavelength range of<10% of the central wavelength (CWL)
• Mass production capabilities: 1’000 pieces per month
• Custom coatings are available for any wavelength in the range 0.19 - 10μm
• Surface flatness, P-V: <λ/8 @ 632.8nm
• Laser damage threshold up to 35.2 J/cm² @ 532 nm, 6.2ns, 50Hz

• * Customized HR Laser Line Mirrors are available on request.
• ** “p” stands for value of reflected p polarization at 45°, “s” stands for value of reflected s polarization beam at 45°.

Low Loss HR Mirrors

Low Loss HR mirrors are essential in laser systems where the lowest possible losses are required. Mirrors are manufactured with Ion Beam Sputtering technology (IBS) reaching extremely high-quality specifications. IBS thin films feature higher density and durability than e-beam coatings, making them resistant to environmental conditions such as heat, humidity and pressure. IBS mirrors reach highest reflectance (>99.9%) in a certain wavelength range and angles of incidence (AOI). Also, scattering is minimized which is usually a limiting factor for high reflectivity.

Features

• Resistant to environmental conditions
• Wide-angle (AOI: 0-50°) mirrors are available
• Mass production capabilities: 1000 pieces per month
• Reflectance higher than 99.9%
• Surface flatness, P-V: <λ/8 @ 632.8nm
• Laser damage threshold up to 17J/cm² @ 1064nm, 10ns, 10Hz

• * Customized Low Loss HR Mirrors are available on request.
• ** “p” stands for value of reflected p polarization at 45°, “s” stands for value of reflected s polarization beam at 45°.

Si Mirrors

Silicon mirrors in a huge range of sizes are available, with a selection of different coatings to suite you application.

• Advanced manufacturing methods
• Latest ultra-low absorption coatings
• Highest quality substrates

Remark: M: material; A(deg): angle of incidence; ET: edge thickness; T(%): transmission; R (%): reflectance; ROC: radius of curvature.

Turning Mirrors, Silicon

These turning mirrors are used in CO2 laser beam delivery systems. Silicon is the most commonly used mirror substrate due to its good "figure of merit" properties. We offer them with a variety of metal and dielectric coatings.

• TMS-EM Turning Mirrors Enhanced Metal for CO2 10.6 µm Reflectance coating
• 45° Angle Of Incidence
• Coated: Reflectance > 99.6% average @ 10.6 µm
• Absorption: < .30% @ 10.6 µm

Turning Mirrors, Silicon Dual-Band Reflector for CO2 + Red Laser Diode Reflectance

• TMS-DBMR Turning Mirrors Silicon with Dual Band Max Reflectance coating
• Coated: Reflectance > 99.7% average @ 10.6 µm
• Reflectance: > 85% average for .633 µm and 650 nm
• 45° Angle Of Incidence
• Absorption: < 0.30% @ 10.6 µm

Phase Retardation Reflectors : Silicon for CO2 Lasers and 10.6µm

These mirrors create a 90° Phase Shift with the aid of specially constructed thin film coating layers applied to the surface, when hit with a linear polarized beam at 45° to the plane of incidence. Commonly called Phase Shifters, Polarizers, or Circular Polarizing Mirrors, they transform the incoming beam into a circular polarized state. They typically are only used external to the laser cavity as a beam delivery mirror. These operate only with a true 10.6µm laser wavelength and will not work at other wavelengths such as 9.2 or 9.6µm without special modifications to the thin film coating design. We offer non-standard wavelength Phase Retardation Reflectors at these other wavelengths as custom parts.

• Phase Shift: 90°±3.0° between p and s polarization for 10.6µm operation only @ 45° Angle Of Incidence
• Reflectance: > 99.0% average @ 10.6µm
• Absorption: < 0.40% @ 10.6µm
• Coating optimized to create 90° phase shift from a linear polarized beam. Used in beam delivery systems where cutting circles in materials is required.

Zero Phase Reflectors: Silicon for CO2 Lasers and 10.6µm

• Phase Shift:<2.0° between p and s polarization for 10.6µm operation only @ 45° Angle Of Incidence
• Reflectance: > 99.6% average @ 10.6µm
• Absorption: < 0.40% @ 10.6µm
• Coating optimized to maintain low phase shift in beam delivery systems where a 90° phase retarder exists to maintain the circular polarization.

Total Reflectors: Silicon Concave for CO2 Lasers and 10.6µm

• Turning Mirrors Silicon with Dual Band Max Reflectance coating
• Coated: Reflectance > 99.6% average @ 10.6 µm
• Operation at normal incidence (0°)
• Reflectance: > 85% average for 633 nm and 650 nm
• Absorption: < 0.30% @ 10.6 µm
• Clear Aperture: 90% of diameter

Cu Mirrors

Copper mirrors in a huge range of sizes are available, with a selection of different coatings to suite you application.

• Advanced manufacturing methods
• Latest ultra-low absorption coatings
• Highest quality substrates

Remark: M: material; A(deg): angle of incidence; ET: edge thickness; T(%): transmission; R (%): reflectance; ROC: radius of curvature.

Gold-coated Reflectors: Glass Substrate

Other dimension mirrors available upon request.

Mo Mirrors

Molybdenum mirrors in a huge range of sizes are available, with a selection of different coatings to suite you application.

• Advanced manufacturing methods
• Latest ultra-low absorption coatings
• Highest quality substrates

Remark: M: material; A(deg): angle of incidence; ET: edge thickness; T(%): transmission; R (%): reflectance; ROC: radius of curvature.

Metal Mirrors, Molybdenum for CO2 Lasers and 10.6µm

• Uncoated
• Phase Shift:<2.0° between P and S polarization
• for 10.6µm operation only @ 45° Angle Of Incidence
• Reflectance: > 98.0% average @ 10.6µm

Reflective Mirrors, Output Couplers

• Reflective Mirror and Output Coupler at 1064nm
• Part Number Description:
• LM-1064-D-T-R-A-%-yy
• LM: laser mirror. R>99.5%.
• 1064: laser wavelength, nm.
• D: mirror diameter, m. If rectangular, it is AxB.
• T: thickness, mm.
• R: radius of curvature, mm. It is flat mirror if ther is no this number. It is plano-convex if it is minus.
• A: incidence angle, degree. It is normal incidence if there is no this number.
• %: tranmittance of output coupler.
• yy: other marks.

There are too many items and models and welcome to call us or send us an email if you have any further enquiry or question!

Laser Reflective Mirrors, Output Couplers & Beam Splitters

Remark: 1. Regarding D50x3mm, 50 means diameter, 3 means thickness, unit is mm. 2. Regarding R=10%, R means reflectivity and unit is %. 3. Regarding T=10%, T means transmittance and unit is %. 4. Regarding R=50mm, R means radius of curvature and unit is mm. 5. HR1064nm means high reflectivity at 1064nm (>98%). 6. HT532nm means high transmittance at 532nm (>98%). 7. Plano-concave means that one surface is flat and another surface is concave.

Resonator Mirrors of Diode End-pumped Lasers

Remark: The output couplers at 1064nm can be used as the output coupler in the diode end-pumped lasers.

Resonator Mirrors of SHG Lasers