0/-1 order phase masks
Cost-effective fabrication of low period gratings
Ibsen's 0/-1 order principle phase masks provide a solution to fabricating low period gratings when the illumination wavelength is not much higher than the grating period. In the production of fiber and waveguide Bragg gratings, the phase mask is illuminated by a laser. Self-interference between the zero and minus first orders produces the required pitch in the fiber or waveguide.
It is imperative that the Phase mask is accurate, uniform and defect-free. Through scientific principles and constants of nature, our fabrication process ensures absolute pitch accuracy.
All our production processes take place in a cleanroom environment, giving you high yield through nearly defect-free Phase masks.
Other important features of our line of 0/-1 order Phase masks are:
Key benefits
0/-1 order principle
The 0/-1 order principle is advantageous for fine-pitch applications that require complete elimination of unwanted orders. In this geometry, light incident at the Bragg angle is diffracted partially into the minus first order. Self-interference between the minus first order and the undiffracted zero order creates an interference pattern with a pitch equal to the phase mask pitch. Thus, 0/-1 order phase masks have half the pitch of the equivalent +1/-1 order phase masks. Our innovative production techniques allow us to manufacture 0/-1 order phase masks with periods down to 260 nm.
Documentation
Product range and specifications
| Parameter | Specification |
|---|---|
| Grating periods | 260 nm - 600 nm |
| Illumination wavelengths | 193 nm - 1065 nm |
| Material | UV grade fused silica |
| Period accuracy | +/- 0.01 nm |
| Period uniformity | +/- 0.01 nm |
| Standard grating sizes | Ø1" Ø2" |
| Fringe visibility | >98% |
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? Over 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 phase mask to use?
For further information or to request a quotation please contact us.