Specifications:
| Materials | Optical Glass | Coating Wavelength Range | 790-990nm |
| Coating | BBAR Coating (790-990nm) | Coating Specification | Ravg<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% | Numerical Aperture | Custom |
Application Notes: Apart from the 790-990nm AR coating, we can also provide other custom coating options, in addition to attached mounts, and sustaining structures.
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 in an asymmetric beam profile, with one axis (the "fast axis") having a narrow divergence angle while the other axis (the "slow axis") has a much wider divergence angle. Slow-axis collimators are used for collimation and reduce its divergence angle along the slow axis direction, resulting in a more symmetrical output beam profile. The slow-axis collimators could either consist of a monolithic array of rod-shaped micro-lenses or a single lens when collimating a single emitter. The aspheric design of the SAC lenses results in low spherical aberrations and therefore efficient collimation of the slow-axis dimensions.
Hangzhou Shalom EO offers Custom Slow Axis Collimators (SAC-lenses) with high-precision manufacturing technique which contributes to low scattering and crosstalk. Flexible custom designs could be tailored upon request. The AR coatings have a high transmission greater than 99%@790-990nm, with other custom coatings available. Our slow-axis collimators are optimized for the collimation of the individual emitters of a laser bar. Substrate materials can be selected and the high optical homogeneities of the glass material of our slow-axis collimators guarantee high beam quality for high-power lasers. The products are compatible with various laser bars and laser stacks and capable of handling high power densities. Our streamlined production line enables us to deliver fast axis collimators at competitive prices, ensuring our customers receive premium products at affordable prices.
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.
Quality Assurance in Shalom EO:
Hangzhou Shalom EO's commitment to quality is reflected in our inspection process for slow axis collimators. With a dedicated QC team, with a leader who is an expert with over 20 years of experience, and advanced instruments such as Zygo interferometers, we ensure every component is tested with care for precision and performance. This meticulous process ensures that our slow axis collimators adhere to the published specifications, providing you with reliable and high-performance components.
Fast Axis Collimator (FAC-Lens)
- Large numerical apertures (NA 0.8), diffraction limited collimation
- High transmission (transmission >99%), low absorption AR coating
- Ideal for collimating lights from diode lasers into fibers
- Substrate materials: UV Fused Silica, or other custom glass materials
- Available both in standard (Dia 38.1mm, 50.8mm, 790-990nm AR coatings, EFL 300μm/360μm/600μm) or custom versions
- Great when used in combination with our slow axis collimators
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