Polymicro Technologies > Products and Technologies > Optical Fibers > SILICA/SILICA Optical Fiber, STU-D Ultra Low-OH Core, STU: Low-OH Core, Excellent FRD, Wide Spectral Range

Products > Optical Fibers > SILICA/SILICA Optical Fiber, STU-D Ultra Low-OH Core, STU: Low-OH Core, Excellent FRD, Wide Spectral Range

SILICA/SILICA Optical Fiber
- STU-D Ultra Low -OH Core
- STU: Low-OH Core
- Excellent FRD
- Wide Spectral Range
STU
STU-D
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Characteristics

Step Index

Numerical Aperture: 0.22 ± 0.02

Full Acceptance Cone: 25.4 degrees

UV-Vis-NIR Transmission, less than 280nm to greater than 2,000nm

Excellent FRD Characteristics for Astronomy Applications

Custom sizes

Optional Jacketing Available

STU: Low -OH Core, Doped Silica Clad

STU-D: Ultra Low -OH Core, Doped Silica Clad

Polyimide Buffer Standard; Silicone, Acrylate, Fluoropolymer, Aluminum & dual buffers also available

Polyimide Concentricity: ± 3µm

Temperature: Operating, –65ºC to +300ºC, Intermittent, up to 400ºC

Proof Tested from 100kpsi

These fiber configurations are based on the latest wide-band synthetic fused silica materials. They are designed for applications such as astronomical spectroscopy, where stable, broadband spectral coverage from the UV to the near IR is required. The Focal Ratio Degradation (FRD) characteristics are excellent. Polymicro Technologies manufactures these fibers with various core sizes, buffers and jackets. Core sizes range from 50µm to over 1000µm, with tight dimensional tolerances and excellent concentricity. The fiber type STU has low -OH (~5-20ppm) for UV use while the type STU-D has ultra low -OH (~1ppm) for improved NIR at the expense of reduced UV transmission¹. The type STU fiber is noticeably improved in the 280nm to 380nm range compared to our standard low -OH (type FI) optical fiber.

Typical Characteristics

These fibers can also be assembled into custom configurations as required. Contact Polymicro to assist you with your needs in optical fiber as well as custom micro-optical components, capillary tubing and assemblies.

1 G. Lu, G.F. Schotz, J. Vydra, D. Fabricant, “Optical Fiber for UV-IR Broadband Spectroscopy,” SPIE Proceedings, Optical Astronomical Instrumentation, V3355, pp884-891, Mar 1998