Fiber optic gas sensor

Fiber optic gas sensors are made of ultra-high purity sulfide glass, specifically designed and manufactured to generate or guide mid infrared wavelengths of 1.5 to 6.5 μ m, with high transmission efficiency and nonlinearity about 100 times that of quartz glass fiber.

Medium wave infrared (MWIR) fiber (1.5 to 6.5 μ m) in sulfur based compounds

Sulfur based glass is based on sulfur based elements (sulfur, selenium, and tellurium), with the addition of other elements such as arsenic, antimony, or germanium. Compared to silica, it has promising properties such as transmission in the mid to far infrared region of the spectrum, lower phonon energy values, high refractive index, and very large nonlinearity. Sulfur based glass fiber is an ideal choice for mid infrared applications that require high-power laser transmission, chemical sensing, thermal imaging, and temperature monitoring.

Medium wave infrared (MWIR) fiber, made of ultra-high purity sulfide glass, is specially designed and manufactured to generate or guide mid infrared wavelengths of 1.5 to 6.5 μ m, with high transmission efficiency and nonlinearity about 100 times that of quartz glass fiber.

The transmission range of single-mode fiber is 1.5-6.5 μ m, and the minimum transmission loss at 4.8 μ m is about 0.15dB/m. Given its core diameters of approximately 5 and 6.5 μ m and numerical aperture of 0.3, step index fibers are truly single-mode fibers for wavelengths greater than their cutoff wavelengths of 1.988 and 2.46 μ m. For wavelengths shorter than the cutoff wavelength and coupled appropriately, the transmitted beam can remain single-mode (or slightly multi-mode) over the entire fiber transmission range in short fibers (<2 m).

Multimode optical fibers have been developed for manufacturing mid infrared fusion fuses. The 50/85 μ m fiber core and cladding design are very suitable for manufacturing 7x1 fiber combiners for output fibers. However, the 50/80 μ m core/cladding structure is too fragile to be terminated with connectors and used as a standalone optical cable.

These fibers can be sold as bare fibers. All bare optical fibers can be terminated using connectors and sold as cables.

Standard fiber optic cable terminated with FC/PC, FC/APC, or SMA905 connectors with stainless steel ferrules.

The protective sheath can be made of stainless steel, stainless steel with PVC or transparent FEP sheath, PVDF and PVC. Other different cable assembly configurations can be provided upon request.

Advantages of Fiber Optic Gas Sensors

low loss

High power processing intensity

High mechanical flexibility

　　Solid fiber opticapplication

Mid infrared laser beam transmission

infrared spectrum

Chemical sensing

Scientific and Medical Diagnostic Infrared Imaging System

Nonlinear supercontinuum generation

　　Fiber optic gas sensorTechnical Specifications