Product novelty 08. July 2020

CASTECH typically employs fused silica or ULE characterized with low absorption and superior stability for the fabrication of gratings. Other optical glass are also available upon request. Our high DE reflection grating is ideal for WSS and other applications in optical comnunication industry. Generated by our state-of-art holographic, iron etching and replication technology, the precise realization of grating designs is enabled that provides high diffraction efficiency and perfect uniformity. The replicas copied from the master grating have the same performance such as low light scatter, extreme environmental stability, excellent groove uniformity at a lower price. Customized solution is available from prototype building to high volume production.

CPA technique is widely used for generation of ultra-short and high energy pulse of lasers. Grating is one of the most critical components in the pulse stretch and compression system to determine their performance. CASTECH’s reflection grating has been successfully applied on pulse compression, which is created by our unique holographic, iron etching and replication technique. The grating delivers low scattering, high diffraction efficiency and features in extreme competitive pricing as well. Customized solution is available from prototype building to high volume production.

Features:
(1) Very High Diffraction Efficiency.
(2) Low scatter
(3) Excellent Feature Fidelity and Groove Uniformity.
(4) Extreme environmental stability. Telcordia qualified.
(5) Very competitive pricing.
(6) Strict quality control. Castech is ISO 9001,14001, 45001certified.
Common Specifications
Grating material: Au
Substrate material: ULE, FS or Zerodur
Diffractive efficiency（%）: TM > 93
Wavefront (λ): <1/4 @632.8nm
Clear Aperture: 0.5mm from all edges
Line density Uniformity: 0.5line/mm
Surface quality (S/D): < 40/20
Parallelism（°）: <0.15
Perpendicularity （°）: <0.15
Customized: Yes