27 Jun 2006
Recent developments in transmission gratings have dramatically increased application areas for transmission gratings.
Historically, diffraction gratings have been produced mainly as reflection gratings by a ruling and replication process in polymers/epoxies, coated with metals. Only for the most demanding applications were transmission gratings produced - with non-matured and expensive process technologies or unstable polymers or gelatins. But today, Ibsen has developed process technology and established production lines that allow for the manufacture of transmission gratings at prices equal to reflection gratings, but with superior features and specifications:
- 100% Fused silica provides unbeatable thermal and environmental stability
- 100% Fused silica provides unbeatable energy and power damage handling capacity, from UV to NIR
- Each grating is a master - holographically recorded and RIE etched - but produced in high volume quantities
- Holographic recording provides lowest stray light
- High diffraction efficiency designs - beyond 95% - are possible
- Low PDL designs are possible
- Transmission gratings solve the issue of overlapping input and output plane, providing more module/device design freedom
Whatever the application - Ibsen transmission gratings offer advantages over reflection gratings:
Spectrometers: Spectrometer design is facilitated by transmission gratings. Furthermore, transmission gratings can meet or beat reflection grating diffraction efficiencies over broad spectra - without spectral anomalies that reflection gratings are well known for.
Laser pulse compression: 100% Fused silica is unbeatable for energy/power/temperature handling. Furthermore wavefront distortion is better than lambda/4 @ 633 nm.
Telecom modules: Surface relief transmission gratings offer diffraction efficiency specs better than that which is possible with reflection or volume transmission gratings, while at the same time being intrinsically Telcordia compliant without epoxies, polymers or gelatins.
Space / defense / scientific / medical: For all demanding applications, Ibsen can provide fused silica transmission gratings with highest diffraction efficiencies, lowest stray light / wavefront distortion, highest power handling capabilities, grating areas small and large, with grating resolutions up to 5000 lines/mm - in volumes from 1 to many thousand.
Contact Ibsen to discuss how Fused silica transmission gratings can offer benefits in your application!
- 100% Class 10 cleanroom produced
Ibsen Photonics is a leading supplier of holographic Phase masks and transmission diffraction gratings. Ibsen Photonics also offers a portfolio of Diffractor based spectrometer modules based on more than 10 years' experience in transmission diffraction gratings.
Ibsen Photonics welcomes partnerships with original equipment manufacturers based on the Ibsen Diffractor technology platform.
Kristian Buchwald, Gratings Product manager
Phone +45 4434 7000
Fax +45 4434 7001
Web site: www.ibsenphotonics.com
Web site: www.diffraction-gratings.com