Products:
Nanopatterned Diffraction Gratings
High-Efficiency Polarization-Independent Transmission Gratings
LightSmyth Technologies' transmission gratings are fabricated on fused silica substrates by deep-ultraviolet photolithography and subsequent etch – the workhorse fabrication tools of the semiconductor industry. These high fidelity fabrication tools enable precise realization of sophisticated proprietary designs involving only robust dielectric materials that provide diffraction efficiency close to unity while essentially eliminating polarization dependent behavior.
Specifications below are for stock grating FSLG952, available immediately. Transmission gratings of similar performance with other line densities, operating spectral bands, input/output beam geometries and substrate sizes can be supplied. Please check the “Custom Gratings” section below for general capabilities and/or contact LightSmyth at 541-431-0026 or info@lightsmyth.com.
Specifications – preliminary
| Parameter | Value | Units | ||
|---|---|---|---|---|
| Minimum | Typical | Maximum | ||
| Substrate Length | 10.95 | 11 | 11.05 | mm |
| Substrate Width | 4.95 | 5.0 | 5.05 | mm |
| Substrate Thickness | 0.625 | 0.675 | 0.725 | mm |
| Grating Length | 8.5 | mm | ||
| Grating Width | 3.0 | mm | ||
| Material | Fused Silica Substrate, Dielectric Films | |||
| Description | Value | Units | ||
|---|---|---|---|---|
| Minimum | Typical | Maximum | ||
| Line Density 1 | 952.3 | Lines/mm | ||
| Line Density Uniformity (within grating) | 0.05 | Lines/mm | ||
| Angle of Incidence AOI 2 (Littrow at 1545 nm) | 47.4 | ° | ||
| Wavelength Range | 1526 | 1566 | nm | |
| Standard Transmission Grating | ||||
| Diffraction Efficiency (TE, TM) | 85 | % | ||
| Polarization-dependent Loss | 0.25 | dB | ||
| High Performance Transmission Grating | ||||
| Diffraction Efficiency (TE, TM) | 94 | % | ||
| Polarization-dependent Loss | 0.2 | dB | ||
Notes: 1. Grating lines are perpendicular to the longer substrate dimension.
2. Optical grating performance will remain substantially similar over a 5 degree variation in angle of incidence.
Measured Diffraction Efficiency Curves
Pricing
Please contact LightSmyth Technologies at 541-431-0026 or info@lightsmyth.com to request a quotation or for additional technical information.
Custom High-Efficiency Transmission Gratings
LighSmyth also offers custom highly-efficient transmission gratings, including those with ultra-low polarization dependence, fabricated to your specifications relevant to the following and many more applications:
- Telecom S/C/L-bands
- Pulse compression of pico- and femto-second Pulses
- High power lasers
- Spectral beam combining
- Custom line densities, sizes and angles of incidence
Our optical engineers will gladly assist with your custom application. Please contact us at 541-431-0026 or info@lightsmyth.com.