Slow Axis Collimators

Substrate Materials: Custom Glass Materials
Low Scatter and Efficient Collimation
Mechanical Durability
AR Coatings deposited
Ideal for: High Power Laser Bars and Stacks, Fiber-Coupled Direct Diode, Solid State Laser Pumping, etc

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Specifications:

Materials	Optical Glass	Coating Wavelength Range	790-990nm
Coating	BBAR Coating (790-990nm)	Coating Specification	R_avg<1.0%@790-990nm
Design Wavelength	808nm	Height Tolerance	±0.05mm
Length Tolerance	±0.05mm	Dimension	Custom
Surface Flatness	λ/4	Pitch	500μm
Transmission	>99%	Clear Aperture	Custom

Application Notes: Apart from the 790-990nm AR coating, we can also provide other custom coating options, attached mounts and sustaining structures are also available.

Slow Axis Collimators (SAC-Lenses) axis collimators are optical components used in lasers, often in diode lasers, to shape and control the output beam. Diode lasers emit light with an asymmetric beam profile, where the fast axis (perpendicular to the junction plane) has a large divergence angle, and the slow axis (parallel to the junction) has a smaller divergence angle. SAC lenses are used to collimate the beam in the slow axis after the fast axis has been collimated by a Fast Axis Collimator (FAC lens), resulting in a more symmetrical and manageable beam for downstream optics.

Hangzhou Shalom EO offers Custom Slow Axis Collimators (SAC-lenses) with high-precision fabrication which contributes to low scattering and crosstalk and AR coatings. We implement a strict inspection procedure in our clean house, where we strive to minimize the deviation between the published standards and the actual qualities. Our slow-axis collimators are optimized for the collimation of the individual emitters of a laser bar. The products are compatible with various laser bars and laser stacks and capable of handling high power densities. Flexible custom designs could be tailored upon request. Combined usage with our Fast-Axis-Collimators is recommendable.

The major functions of our slow-axis collimators include:

Beam Shaping: Our slow-axis collimators are designed to reshape the elliptical beam generated from diode lasers into a more circular or symmetric beam profile. This makes the laser beam easier to focus or collimate further downstream in an optical instrument.
Improving Beam Quality: By reducing the divergence angle along the slow axis, slow-axis collimators improve the overall beam quality of the laser output. This is important for applications where a high-quality, symmetric beam profile is required, such as in laser materials processing or medical applications.
Beam Collimation: In addition to shaping the beam profile, slow axis collimators also collimate the beam along the slow axis. This means that the beams are made parallel to each other, which helps in maintaining beam integrity over long distances.
Divergence Control: By reducing the divergence along the slow axis, slow axis collimators can also control the overall divergence of the laser beam, leading to better focusing and longer range for applications like laser cutting or laser engraving.