Dielectric Mirror, 19.05 mm, λ/10, 1520-1580 nm Laser Line

Borofloat 33 Laser Line Dielectric Mirrors

The 07D20DM.8 Laser Line Dielectric mirror is a highly efficient reflector optimized for a narrow 1520 to 1580 nm wavelength range. This 3/4 inch (19.05 mm) diameter mirror is made from a 4.57 mm thick Borofloat® 33 substrate. Borofloat has low thermal expansion and is an excellent substrate for most applications. The DM.8 coating is designed for use with diode lasers and has a center wavelength of 1550 nm. The coating achieves greater than 99% reflectance, from 0–45° angle of incidence, for any polarization. This multilayer dielectric coating is extremely durable, making it resistant to damage from repeated cleaning. This mirror has a λ/10 surface flatness and a 15-5 surface quality.

Specifications

Technical Specs

Wavelength Region
IR
Wavelength Range
1520-1580 nm
Mirror Shape
Round
Diameter
19.05 mm
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.8
Reflectivity
R_s, R_p>99% @ 1520-1580 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
07D20
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
4.57 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.25–0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 10 J/cm² for 10 nsec pulses @ 1540 nm

Wavelength Region
IR
Wavelength Range
1520-1580 nm
Mirror Shape
Round
Diameter
19.05 mm
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.8
Reflectivity
R_s, R_p>99% @ 1520-1580 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
07D20
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
4.57 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.25–0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 10 J/cm² for 10 nsec pulses @ 1540 nm

Resources & Downloads

Other

07D20DM.8 RoHS Certificate(695.1 kB, PDF)
DM.8 Raw Data.xlsx(57.3 kB, XLSX)

2D Product Drawings

Laser Line Dielectric Mirror Drawing(102.9 kB, PDF)

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