Reduced Cladding In-Line
Optical Fiber Polarizers

_EXAMPLE APPLICATIONS  ____• Fiber optic gyroscopes ____• Polarimetric fiber sensor systems ____• Optical fiber sensors ____• High density fiber systems ____ ____ ____ ____

_FEATURES ____ • 80 um cladding fiber ____ • High extinction ratio ____ • Low loss ____ • Near zero back reflection ____ • Low cost ____ • Wide wavelength operating range ____ • Small size ____ • Rugged packaging ____ • All-fiber construction

EVANESCENT FIELD POLARIZERS Phoenix evanescent field fiber optic polarizers are produced by replacing the cladding in the locally processed region of the fiber with a polarization selective material. Within the polarizing region one polarization mode of the single mode fiber is highly attenuated and the other mode propagates with virtually no loss. Extinction ratios above 50dB are readily achievable whilst maintaining extremely low transmission loss of the required polarization mode.

REDUCED CLADDING RANGE Phoenix reduced cladding polarizers have been designed for applications utilizing 80 um clad fiber. The devices are broadband, but optimized for 1300nm and 1550nm operational wavelengths. The polarizers are available with singlemode or polarization maintaining fiber tails. The all-fiber construction providing low loss, virtually zero reflection with high extinction ratio makes these devices ideal for polarization sensitive sensor systems such as the optical fiber gyroscope.

_SPECIFICATIONS	SM/SM	SM/PM	PM/PM
Wavelength 1	1550nm
Wavelength range	+-20nm
Maximum extinction ratio 2	>45dB	>40dB	>40dB
Insertion loss 3	<0.5dB	<1dB	<1.5dB
Wavelength 1	1300nm
Wavelength range	+-20nm
Maximum extinction ratio 2	>35dB	>35dB	>35dB
Insertion loss 3	<0.5dB	<1dB	<1.5dB
Return loss 4	>70dB
Package size 5___standard	50 x 2 dia	75 x 3 dia	100 x 3 dia
Package size 5___miniature	30 x 2 dia	40 x 3 dia	50 x 3 dia
Operating temperature range 6	-5ºC to 70°C
Transportation/storage 7	-40ºC to 85ºC
Pigtails 9	1m fiber standard, 900um loose tube optional
Outer packaging	Stainless steel tube

All dimensions are approximate and may vary slightly.

Notes to Specifications

• All specifications are worst case for the _• wavelength range selected; actual products _• commonly exhibit better performance. _• All polarizers are tested and graded into _• performance groups. _• SM – single mode fiber: PM – polarization _• maintaining fiber. 1. The devices will provide polarization over the full wavelength range for which the fiber is single mode. Performance characteristics are wavelength dependent and the devices will meet specification as follows: _•  Type 15 – 1530nm to 1570nm _•  Type 13 – 1280nm to 1320nm 2. These are the maximum extinction ratios typically achievable for each of the options. If alternative values are required please discuss with our sales representative.

3. Insertion loss is typically in the region of 0.2dB (SM/SM) to 1dB (PM/PM), excluding connectors. 4. The all-fiber technology gives an excellent return loss figure of >70dB. 5. Dimensions are in mm. Standard – POL, miniature – MPOL. 6. The operating temperature range is specified for typical telecommunications operation. Please discuss with the sales representative if operation outside the specified range is required. 7. The devices are very robust for storage and transportation. 8. Pigtails are typically no shorter than 1m.

 

PRODUCT ORDERING INFORMATION
Note: Not all options below are available in all polarizer types, please check with our
sales representative to ensure your specific requirements can be met.

Download spec sheet as a pdf file

U6 Vulcan House, Restmor Way, Wallington, Surrey SM6 7AH UK
T: +44 (0)20 8669 8559 F: +44 (0)20 8669 7667
E: sales@phoenixphotonics.com