PM Gyro Fiber
Fibercoreare the world’s leading supplier of Polarization Maintaining (PM) fibers forFiber Optic Gyroscopes (FOGs). By using ‘Bow Tie’ Stress Applying Parts (SAPs),stress can be efficiently focused across the core of the fiber, offeringindustry leading levels of birefringence to maintain high levels ofPolarization Extinction Ratio (PER). By combining the high birefringence withFibercore’s optimized gyro fiber coating package, the world’s highestperformance levels can be achieved.
The PM Gyro range of fibers offer Short Beat-Length (SB) variants for thehighest PER levels, High Numerical Aperture (NA) fibers (HI) for reduced macroand micro bend losses in small coil diameters and Radiation Tolerant (RT)variants for space missions.
High Polarization Extinction from -55ºC to +85oC
Performance is maintained over a wide temperature range. Under test conditionsdesigned to simulate those encountered in a typical FOG coil. Extinction ratiosof better than 30dB (h-parameter of 1×10-5 m-1) have been maintained down to -55ºC,with extinction of over 28dB demonstrated right down to -60ºC.
Advantages:
• ‘Bow-Tie’ design engineered to give superior birefringence
• The World’s best selling Gyro fiber
• Optimized coating package for best PER performance over temperature
• Radiation tolerant designs for space applications
• High NA designs for reduced bend loss in small coil diameters
Typicalapplications:
• FOGs
• Current Sensors
• Delay Lines
RelatedProducts:
• PM Coupler Fiber (HB-C)
• Standard PM Fiber (HB)
• Telecoms PM Fiber (HB-T)
• Polyimide Coated PM Fiber (HB-P)
• PM Gyro Fiber (HB-HT)
• Erbium Doped Fiber IsoGain™
ProductVariants:
• HB800G PM Fiber for 830nm fiber optic gyroscopes
• HB800G-SB Short beat-length PM Fiber for 830nm fiber optic gyroscopes
• HB1250G PM Fiber for 1310nm fiber optic gyroscopes
• HB1500G PM Fiber for 1550nm fiber optic gyroscopes
• HB1500G-RT Radiation tolerant PM Fiber for 1550nm fiber optic gyroscopes
• HB1500G-SB Short beat-length and radiation tolerant PM Fiber for 1550nm fiberoptic gyroscopes
• HB1500G-HI High NA PM Fiber for 1550nm fiber optic gyroscopes with very lowbend loss
Specifications
| HB800G | HB800G-SB | HB1250G | HB1500G | HB1500G-RT | HB1500G-SB | HB1500G-HI |
Operating Wavelength (nm) | 830 | 1310 | 1550 |
Cut-Off Wavelength (nm) | 660 - 800 | 1030 - 1270 | 1230 - 1520 | 1360 - 1520 |
Numerical Aperture | 0.14 - 0.18 | 0.19 - 0.21 |
Mode Field Diameter (μm) | 3.6 – 5.0 @830nm | 5.8 – 7.8 @1310nm | 6.9 – 9.3 @1550nm | 6.0 – 7.0 @1550nm |
Attenuation (dB/km) | ≤5 @830nm | ≤2 @1310nm | ≤2 @1550nm | ≤3 @1550nm |
Beat Length @633nm (mm) | ≤1.5 | ≤1.2 | ≤1.5 | ≤1.15 | ≤1.5 |
Proof Test (%) | 1 (100 kpsi). 2 (200 kpsi) or greater upon request |
Cladding Diameter (μm) | 80 ± 1 |
Core-Cladding Concentricity (μm) | ≤1.0 |
Coating Diameter (μm) | 170 ± 10 | 165 ± 10 | 155 ± 10 |
Coating Type | Dual Acrylate |
Radiation Tolerant | No | Yes | No |
