Broadband polarizing cube beamsplitters provide efficient polarization for use with multiple or tunable sources. Each beamsplitter consists of a pair of precision right-angle prisms carefully cemented together to minimize wavefront distortion. The hypotenuse of one of the prisms is coated with a multilayer dielectric polarizing beamsplitter coating optimized for a broad wavelength range. The four faces are antireflection coated with a multilayer dielectric coating to minimize surface reflection losses.
An unpolarized beam is split into two orthogonal, linearly polarized components. P-polarized light is transmitted, while s-polarized light is reflected, both with negligible absorption.The extinction ratio is better than 500:1, yet it averages 1000:1. This unique component provides all the benefits of a broadband polarizer in a standard cube configuration.
Broadband polarizing cube beamsplitters are available in four wavelength ranges covering the visible through near infrared. They are offered in two sizes: 12.7 and 25.4 mm.
The UPBS-1 low GVD polarizering beamsplitter has a unique shape which allows ultra-broadband pulses to travel in and out of the polarizer without refraction, thus avoiding spatial dispersion of the broadband pulse (known as the prism effect). It is an ideal choice for Ti:Sapphire ultrashort pulsed lasers such as the Tsunami and Mai Tai.
