Polarizer

Helica™ In – Fiber Linear Polarizer

The Helica™ In-Fiber Polarizer (IFP) is an all-glass, flexible polarizer for users requiring the best polarization extinction ratio (PER) available over a broad spectral range within a fiber. The polarized light is scattered over the length of the chiral grating rather than absorbed.

Polarizers have been delivered to address specific spectral needs ranging from 800-2000 nm. Specifications and typical spectra for polarizers with central wavelengths at 1550 and 1310 are shown below. Custom pigtails, jacketing, cabling and connectorization can be accommodated. Please speak to us about your specific needs.

Applications:

Polarization measurement and control
Coherent transmission
Optical sensors
Test and measurement instrumentation
Navigation instrumentation
R & D
Fiber lasers

PROPERTIES
Central Wavelength ¹	1310 nm, 1550 nm
Bandwidth	>50 nm
Extinction Ratio ²	>25 dB
Typical Insertion Loss	<2 dB
Optical Return Loss	-22 to -24 dB
Package	See schematic below
Pigtails	PM or SM, 1 m
Operating Temperature	-50 to +50°C
Storage Temperature	-70C to +85C

Other wavelengths available upon request
Typically the passing polarization travels along the slow axis. Fast axis alignment can be provided upon request. Polarizer is unidirectional. Higher polarization extinction ratio (PER) may be available upon request. Connectorization will typically lower PER Degree of polarization > 40 dB.
Connectorization available upon request

Helica™ In – Fiber Circular Polarizer

Chiral Photonics, Inc. (CPI), introduces an all-glass, in-fiber polarizer based on its proprietary chiral technology that provides a circularly polarized output in a fiber format.

The polarizer can be manufactured to meet your spectral and performance specifications, including central wavelength, bandwidth and extinction ratio requirements. Specifications are shown below.

The circular polarizer acts as a quarter waveplate and the quality of the output circularly polarized light is dependent on the quality of the linearly polarized light that is input into the device.

Pigtailing and connectorization of the device can be customized, as needed. However, an output connector is not recommended. The output SM fiber should be kept as short and unperturbed, mechanically and thermally, as possible. Chiral Photonics has not tested an output fiber that has demonstrated maintenance of good circular polarization extinction ratio (cPER), similar to what exists for linearly polarized light.

Please call us to discuss your specific requirements and receive a prompt quotation.

Applications:

Polarization measurement and control
Optical sensors
Test and measurement instrumentation
R & D

PROPERTIES
Central Wavelength ¹	980 nm, 1064 nm, 1310 nm, 1550 nm
Bandwidth	>50 nm
Extinction Ratio ²	>25 dB
Typical Insertion Loss	<2 dB
Package Style	Rigid or Flexible, see schematics below
Pigtails ³	PM input, SM output, 1 m
Operating Temperature	-50 to +50oC
Storage Temperature	-70C to +85C

Other wavelengths available upon request
This extinction ratio is guaranteed at the polarizer output but pigtail choice and handling may affect resultant output. Circular polarization can be either right- or left-handed. Typically the slow axis is converted to right-handed, circularly polarized light.
Connectorization available upon request.