Fiber Optic Depolarizer – PolaZero™
Capable of depolarizing lasers with coherence lengths of kilometers, General Photonics’ passive depolarizer is miles ahead of the competition. This patented device comes in a package as small as 85 × 60 × 10 mm for lasers with coherence lengths less than 10 meters. Devices for coherence lengths in the kilometer range can be custom made in a larger package, with nominal customization fees. This device is ideal for minimizing the polarization sensitivity of fiber optic sensor systems such as systems for quasi-distributed temperature and strain sensing based on fiber Bragg gratings (FBG), systems for distributed temperature and strain sensing based on Brillouin or Raman scattering, and systems for distributed acoustic sensing based on Rayleigh scattering. It can also help to eliminate the effects of PDL or polarization sensitivity of optical components and instruments. Equally important,it can be used for depolarizing pump lasers to eliminate the polarization sensitivity of Raman amplifiers. The rugged package provides high performance and superb environmental stability. The internal structure and package size may be different depending on the coherence length or spectral width of the light signal to be depolarized (see standard package drawings below).
Features:
. For lasers with coherence length up to and beyond 10m
. Low degree of polarization
. Wide operating wavelength range
. Low insertion loss
. Compact size
Applications:
. Minimize polarization sensitivity of FBG based fiber sensor systems
. Reduce polarization sensitivity of Brillouin, Raman, or Rayleigh
scattering based distributed fiber sensor systems
. Remove polarization sensitivity of Raman amplifiers
. Eliminate polarization sensitivity of optical instruments
. Reduce PDL effects of optical components
Specifications:
Center Operating Wavelength1
1310 nm, 1550 nm
Operating Wavelength Range
± 50 nm
Coherence Length of Light Source
10 m standard, others specify
Output Degree of Polarization
< 5%
Insertion Loss
1.0 dB typical, 1.4 dB max.
Residual Extinction Ratio
< 0.5 dB
Return Loss
55 dB
Optical Power Handling
300 mW min.
Operating Temperature
0 to 70 °C
Storage Temperature
-40 to 85 °C
Fiber Type
Input: PM Panda fiber, Output: SMF-28
Dimensions
85 × 60 × 10 mm for DEP-001
85 × 85 × 15 mm for DEP-003
85 × 60 × 10 mm or 85 × 85 × 15 mm for DEP-002, depending on the
coherence length of the light source
A larger package may be used for coherence lengths greater than 200 meters.
Note: Values are referenced without connectors
1. Contact General Photonics regarding other wavelengths..
Typical Performance Data:
Figure 1. Degree of Polarization (DOP) as function of wavelength and temperature.
Dimensions (standard packages in mm):
Ordering Information:
商品属性 [波长] 1310 nm, 1550 nm