DPSK Phase Demodulator, C-Band,2.5GHz FSR, Tunable
P/N: DI-CCEFAS001
1. Introduction
Optoplex’s Optical DPSK Demodulator, also known as Delay Line Interferometer (DLI), converts phase modulation to amplitude modulation over the entire C+L band in support of data transmission rates of 2.5, 10 or 40 Gb/s. The DPSK demodulator is designed for phase modulated optical communication systems utilized in commercial, defense and space exploration markets. The device plays a key role in improving signal quality and performance to meet the expanding demand for higher data rates and more complex transmission formats within current and next generation systems without major capital expenditure. Optoplex’s DPSK Demodulator is based on a patented free-space optical design, which is compact, athermal and polarization-independent. The measured frequency drift over temperature is only ~0.02 GHz/°C for our standard passive device. Further, this DPSK Demodulator exhibits a total polarizationdependent phase shift of less than 2 degrees over the entire operating temperature range with a high extinction ratio. Optoplex’s DPSK Demodulators can be configured to be fully tunable, colorless tunable or purely passive. Dual-Rate DPSK Demodulator is also available.
Key Features and Benefits
· Athermal design
· C+L band coverage by a single device
· Low temperature-dependent frequency shift (TDFS)
· Low polarization-dependent frequency shift (PDFS)
· Low insertion loss & PDL
· High power handling
· Passive, colorless tunable (both aligned to ITU Grid) or fully tunable
· Telcordia GR-1221 qualified
Applications
· 2.5, 10, 20 or 40 Gb/s commercial DPSK signal reception
· Customized data rate for advanced applications
· Data rate optimization
· Extend transmission distance
The DPSK DLI described in this product specification is a DPSK DLI with a FSR of 2.5GHz.
2. Absolute Maximum Rating
Table 1, Absolute maximum rating
Item
Parameter
Symbol
Condition
Min
Max
Unit
1
Storage temperature range
Tstg
-40
85
°C
2
Storage humidity
RHstg
Non Condensing
5
95
%
3
Maximal optical input power
Popt_max
Continuous wave
21
dBm
4
DLI tuning voltage
Vmax
DC voltage
6
V
5
Minimum bending radium of
R
SMF-28
15
mm
3. Operating Conditions
Table 2, Operating Conditions
Item
Parameter
Symbol
Condition
Min
Typ.
Max
Unit
1
Operating case temperature range
Tcase
-5
65
°C
2
Relative humidity range
RH
Long Term, noncondensing
5
90
%
3
Operating frequency range
f
C- Band
191.15
196.1
THz
4
DLI Tuning Voltage
V
DC
0
5
V
4. Optical Performance Specification
Table 3, optical performance specification
Parameter
Unit
Specification
Wavelength Range (C-Band)
nm
1527 ~ 1567
Free Spectral Range1 (FSR)
GHz
2.5GHz
FSR Error
%
< 1
Insertion Loss1 (including 2 connectors)
dB
2.2 Typical; 2.7 Max
Insertion Loss Difference1 (between two Output ports)
dB
< 0.7
Extinction Ratio1
dB
> 18
PMD1
ps
< 0.1
Return Loss
dB
> 40
PDL1
dB
< 0.2
PDFS1
deg
< 3
TDFS1
MHz/oC
< 10
Optical Path Delay1 (between the 2 receiving ports)
ps
< 0.5
Tuning Time Constant2
sec
< 1.0
Tuning Range
FSR
> 1.5
Tuning Voltage Range
V
0 ~ 5
Tuning Power Consumption
W
0.5 Typical; 1.0 Max
Note:
1. Over the stated spectral and operating temperature ranges and all polarization states.
2. Defined as the time required to reach half-way from the starting and ending points.
5. Physical and Mechanical Specification
5.1 Device Dimension
Table 4, Device Dimensions
Parameter
Length
Width
Height
Unit
Value
73
54
16.2
mm
Note:
1. Not including the collimator sleeves extending in two adjacent sides. See the detailed drawing below.
5.2 Mechanical Drawing
5.3 Fiber and Connector
Table 5, Fiber and Connector Requirements
Item unit Description Connector Type - FC/APC Fiber Pigtail Type - SMF-28 with 900 μm loose tube Fiber Pigtail Length cm 100±10
5.4 Port Definition and Labeling
Port Labeling:
Type and location —— Flag-type on fiber near connector.
Content —— 1, 2 and 3 for Port 1, Port 2 and Port 3 respectively.
6. Electrical Specification
Table 6, Electrical Pin Definition
Pin Name Function 1 I+ Control the phase tuner. No parity. The driving voltage (0~5VDC) applied to Pin#1 and #2. 2 I- 3 - Not in use 4 -
7. Label Requirements
7.1 Port label position and type——Flag tape on pigtail near connector. Width of tape: ~3 mm.
7.2 Port label contents —— See Figure 3. 7.3 Device label —— On top, contains the following information:
a) Optoplex logo
b) Product description: DPSK Phase Demodulator, C-Band, 2.5 GHz FSR, Tunable
c) Manufacturer P/N: DI-CCEFAS001
d) Manufacturer S/N: (TBD)
8. Quality and Reliability
8.1 General
RoHS 6/6 compliance
Telcordia 1221-CORE qualified
8.2 Special Requirements
Optoplex’s DPSK DLI has been successfully used for aerospace application, i.e., in an environment of low pressure.
Also, the device can withstand more stringer mechanical shock and vibration conditions (than normally specified by Telcordia 1221-CORE)
商品属性 [波长] 1527 ~ 1567nm