ULS fibers have a pure silica low OH core and a doped silica cladding with a high 0,29 NA (acceptance angle 33,7°).
Two types of construction are offered :
• Silica /silica fibers with a polymer buffer (HCS type) to increase their mechanical resistance and optimize transmission of cladding modes, and a ETFE external coating.
• Silica /silica fibers with polyimide coating more resistant to chemical and high temperatures from -65°C to +300°C.This coating also strips cladding modes for enhanced performance in sensing and spectroscopy applications.
Note : the ULS272 fiber is particularly used for medical probes