In-Line Optical Fiber Raman Depolarizers.
Raman amplifiers are devices that use the intrinsic properties of single mode optical
fiber to create distributed amplification. By using broadband light sources for the Raman pump, several
advantages over traditional Raman amplification techniques can be obtained. These include an ultimate in gain
flatness and ripple, reduction in four wave mixing and a dramatically simplification in polarization scrambling
or depolarization.
The Intelmac Raman pump laser Depolarizer is a cost effective all fiber device that
produces
an ultra low degree of polarization (DOP) output for these broadband sources. The Raman
Depolarizer can be spliced directly to the polarization multiplexed combiner or broadband source and
will evenly depolarize the fast an slow axes power distribution at any of the 14xx pump wavelengths.
Intelmac offers a variation of these devices and an in-line all fiber polarizer can
be integrated on
the input side of the depolarizer to improve Raman source depolarization stability.
Features:
|
| - Low Degree of Polarization (DOP) |
| - Near zero back reflection |
| - Low insertion loss |
| - Large operating bandwidth |
| - All-fiber configuration |
| - Robust OEM packaging available |
|
Applications:
|
| - Reduce PDL in SLD, ELED and FP laser sources |
| - Reduce PDG in ASE sources and amplifiers |
| - Randomize residual polarization for low coherence sources |
| - Optical transmission systems |
| - Polarization measurement systems |
| - Raman source depolarization |
|
|
Raman Depolarizer Specifications.
Source Line Width (FWHM) |
>10nm |
>20nm |
Residual extinction ratio (RER) (typical) |
<0.1dB |
<0.01dB |
DOP |
<2.5% |
<0.5% |
| Insertion loss (max)* |
<0.5dB (<1.5dB with input polarizer) |
| Operating Bandwidth |
1400 - 1500 nm |
| Return Loss ** |
>70dB |
| Operating Temperature |
-20 °C to 70 °C |
| Transportation &Storage |
-40 °C to 85 °C |
| Pigtail Options |
900um Loose tube |
| Dimensions (mm) LxWxH *** |
150x106x32 |
| Connectors |
Optional |
Notes to Specifications:
| 1. |
* Insertion loss specification is worst case without
connectors. Significant improvements in performance can be made if required. |
| 2. |
** Return loss specification is worst case without
connectors. |
| 3. |
*** Packaging is designed to provide a rugged product.
Alternative smaller/larger packaging to your specification is available. |
| 4. |
Due to ongoing improvements Intelmac reserves
the right to change any specifications without prior notice - please discuss
your specific depolarizers requirement with Intelmac. |
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Raman Depolarizer Ordering Information:
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