Grating polarizer for variable attenuation of Ti: sapphire lasers
High energy capable grating polarizers
For high energy, ultrafast laser applications, common polarizer technologies used for variable attenuation do not fulfill the complete set of requirements to extinction ratio, transmission level, bandwidth, transmitted wavefront distortion, GDD ripple and energy handling capability. For these applications, and initially developed solely for Ti:sapphire wavelengths, Ibsen offers a unique, grating-based polarizer. The polarizer is 100% fused silica, with the polarizing grating being a surface relief, etched grating structure with no thin-film coatings of any kind.
Configuration
We offer pattening and etch of grating structures on fused silica or other materials, applying Ibsen’s unique know-how:
The grating polarizer transmits close to 100% of the incoming TM (p) polarized light, while the TE(s) polarized light is diverted into other diffraction orders (primarily -1T but also a few percent into reflected orders.)
In order to use the grating polarizer as a variable attenuator, either rotate the grating or the incoming, linearly polarized light so that the ratio of TM:TE provides the wanted attenuation.
Grating polarizer product
| Grating | Bandwidth | AOI | Non-deflected polarization | TM | Grating size | Substrate size |
|---|---|---|---|---|---|---|
| PDG-2174/800-801 | 800 nm | 59.5° | TM (p) | >95% | 36 mm x 18 mm | 38 mm x 20 mm |
Ibsen as your grating manufacturer
At Ibsen Photonics, we recognize that the optical grating is a mission-critical component in your device or instrument, where performance and reliability are non-negotiable.
As an ISO 9001 and 13485 certified manufacturer, we bring decades of expertise in both prototyping and high-volume production of transmission gratings. Our focus is unwavering: to deliver superior, consistent quality.
Our commitment is backed by robust, proven designs, 100% metrology on diffraction efficiency, and comprehensive outgoing inspection. The result? Hundreds of thousands of gratings deployed in the field – without a single reliability failure or return.
We maintain stable supply chains through long-standing partnerships with qualified sub-suppliers and offer flexible delivery models tailored to OEM needs, including frame orders and Kanban agreements.
Partnering with Ibsen means you can rely on a trusted, experienced grating supplier – so you can stay focused on advancing your core technology.
Advantages working with Ibsen:
Which transmission grating to use?
For further information or to request a quotation please contact us.