Laser Output Coupler

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Laser Output Coupler

An output coupler (OC) is a partially reflecting dielectric mirror used in a laser cavity to transmit a controlled portion of light, forming the final laser beam.

Clear Aperture, %	>90%
Coating Adhesion and Durability	Per MIL-C-675A
Diameter Tolerance, mm	+0.0/-0.1 mm
Laser Damage Threshold, J/cm²	>10J/cm² for 10 ns pulses @ 1064 nm
Protective chamfers	<0.25 mm x 45 deg
Surface Flatness	<λ/8 @ 632.8 nm
Surface Quality, S-D	20-10
Thickness Tolerance, mm	±0.1 mm

Description

Details

An output coupler (OC) is a partially reflective dielectric mirror that serves as a critical component in a laser cavity. Its function is to transmit a controlled portion of the intracavity optical power to produce the final laser beam.
The output couplers offered here are designed for stable resonators, featuring a spatially constant Reflection/Transmission (R/T) value across the mirror. A laser's pump power threshold, maximum output power, and efficiency are highly dependent on this R/T ratio, making the selection of the right OC a crucial step in laser design. To minimize power loss, the rear surface is treated with an anti-reflection (AR) coating.

Specialized options are also available to enhance beam quality:

Concave mirrors help maintain the fundamental TEM₀₀ spatial mode within the resonator.
Wedged mirrors deflect Fresnel reflections, preventing their amplification inside the cavity and the formation of secondary (parasitic) pulses.

For your convenience, Laserand stocks a variety of commonly used output couplers suitable for high-intensity intracavity applications.

Features

Suitable for use in high intensity intracavities
Back surface AR coated
Curved mirrors with different ROC are available

Name	Angle of Incidence (AOI), deg	Dimensions, mm	Material	Reflectivity ( average), %	Wavelength, nm	Price	Quantity
1-OS-1-0254-6-[3L00-70]	0 - 5 deg	Ø25.4 x 6 mm	BK7	70 ± 2%	1550 nm	US$79.30
1-OS-1-0254-6-[3L00-80]	0 - 5 deg	Ø25.4 x 6 mm	BK7	80 ± 2%	1550 nm	US$79.30
1-OS-1-0254-6-[3L00-90]	0 - 5 deg	Ø25.4 x 6 mm	BK7	90 ± 1%	1550 nm	US$87.10
1-OS-1-0254-6-[3L00-95]	0 - 5 deg	Ø25.4 x 6 mm	BK7	95 ± 1%	1550 nm	US$87.10
1-OS-1-0254-6-[3L00-97]	0 - 5 deg	Ø25.4 x 6 mm	BK7	97 ± 1%	1550 nm	US$87.10
1-OS-1-0254-6-[3L00-98]	0 - 5 deg	Ø25.4 x 6 mm	BK7	98 ± 1%	1550 nm	US$87.10
1-OS-1-0254-6-[3L00-99]	0 - 5 deg	Ø25.4 x 6 mm	BK7	99 ± 0.5%	1550 nm	US$87.10
1-OS-2-0254-5-[3F100-70]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	70 ± 3%	760 - 840 nm	US$113.10
1-OS-2-0254-5-[3F100-80]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	80 ± 3%	760 - 840 nm	US$113.10
1-OS-2-0254-5-[3F100-90]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	90 ± 2%	760 - 840 nm	US$113.10
1-OS-2-0254-5-[3F100-95]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	95 ± 1%	760 - 840 nm	US$113.10
1-OS-2-0254-5-[3F100-97]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	97 ± 1%	760 - 840 nm	US$117.00
1-OS-2-0254-5-[3F100-98]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	98 ± 1%	760 - 840 nm	US$117.00
1-OS-2-0254-5-[3F100-99]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	99 ± 0.5%	760 - 840 nm	US$123.50
1-OS-2-0254-5-[3H100-70]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	70 ± 3%	1020 - 1070 nm	US$113.10
1-OS-2-0254-5-[3H100-80]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	80 ± 3%	1020 - 1070 nm	US$113.10
1-OS-2-0254-5-[3H100-90]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	90 ± 2%	1020 - 1070 nm	US$113.10
1-OS-2-0254-5-[3H100-95]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	95 ± 1%	1020 - 1070 nm	US$113.10
1-OS-2-0254-5-[3H100-97]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	97 ± 1%	1020 - 1070 nm	US$117.00
1-OS-2-0254-5-[3H100-98]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	98 ± 1%	1020 - 1070 nm	US$117.00
1-OS-2-0254-5-[3H100-99]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	99 ± 0.5%	1020 - 1070 nm	US$123.50
1-OS-2-0254-5-[3H200-70]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	70 ± 2%	1064 nm	US$102.00
1-OS-2-0254-5-[3H200-80]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	80 ± 2%	1064 nm	US$102.00
1-OS-2-0254-5-[3H200-90]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	90 ± 1%	1064 nm	US$102.00
1-OS-2-0254-5-[3H200-95]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	95 ± 1%	1064 nm	US$102.00
1-OS-2-0254-5-[3H200-97]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	97 ± 1%	1064 nm	US$102.00
1-OS-2-0254-5-[3H200-98]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	98 ± 1%	1064 nm	US$102.00
1-OS-2-0254-5-[3H200-99]	0 - 5 deg	Ø25.4 x 5 mm	UVFS	99 ± 0.5%	1064 nm	US$102.00