Raman Fiber Amplifer( RFA)
Raman fiber amplifier is an optical amplifier that uses the stimulated Raman scattering effect in single-mode fiber to amplify the optical signal. There are usually Counter Raman amplification and Co-Propagating amplification.
The amplifier modules can be operated at constant pump power (Automatic Pump Power Control, APPC). Different wavelength pump power can be adjusted to achieve smooth gain spectrum for the DWDM network application. It can amplify the single channel signal, in order to achieve the best OSNR; the module integrated a narrow band filter to suppress the ASE power. Counter-propagating pumping configuration, Pre-DRA: Co-propagating pumping configuration, Boost-DRA: Pump Signal Signal PD PUMP IN OUT PD REF PD pump Pump Signal Signal PD PUMP IN OUT PD REF PD pump
Counter-propagating pumping configuration, Pre-DRA:
Co-propagating pumping configuration, Boost-DRA:
Performance
Absolute maximum ratings
|
Parameter |
Min |
Max |
Unit |
|
Operating case temperature |
-5 |
55 |
°C |
|
Operating relative humidity |
5 |
95 |
% |
|
Storage Temperature |
-40 |
75 |
°C |
|
Storage relative humidity |
5 |
95 |
% |
|
Power consumption |
45 |
W |
Optical characters
PRE-DRA for DWDM network application
Name1: Pre-DRA G26 for DWDM Vendor PN: DRAOP-G26-5D-LU-CW
|
Item |
Min. |
Typ. |
Max. |
Unit |
Note |
|
Operation wavelength |
1528 |
1565 |
nm |
||
|
Input power |
-36 |
-10 |
dBm |
||
|
Effective Gain |
26 |
28 |
dB |
@ G652 fiber >40km Attenuation coefficient 0.20dB/km |
|
|
Gain flatness |
2.5 |
dB |
@G=26 |
||
|
Pump wavelength |
1423~1465 |
nm |
|||
|
Total Pump out power |
1300 |
mw |
@/pump 500mw setting |
||
|
Noise figure |
0 |
dB |
|||
|
Input signal threshold |
-38 |
dBm |
Name2: Pre-DRA G14 for DWDM Vendor PN: DRAOP-G14-5D-LU-CW
|
Item |
Min. |
Typ. |
Max. |
Unit |
Note |
|
Operation wavelength |
1528 |
1565 |
nm |
||
|
Input power |
-36 |
-10 |
dBm |
||
|
Effective Gain |
12 |
14 |
15 |
dB |
@ G652 fiber >40km Attenuation coefficient 0.20dB/km |
|
Gain flatness |
2.2 |
dB |
@G=14 |
||
|
Pump wavelength |
1423~1465 |
nm |
|||
|
Total Pump out power |
700 |
mw |
@/pump 500mw setting |
||
|
Noise figure |
0 |
dB |
|||
|
Input signal threshold |
-38 |
dBm |
Boost-DRA
Name: Boost-DRA Vendor PN: DRAOB-G10-5D-LU
|
Parameter |
Min |
Typ |
Max |
Units |
Remark |
|
Operation wavelength |
1550 |
nm |
|||
|
Input power |
0 |
14 |
dBm |
||
|
Effective Gain @in=14 dBm |
10 |
dB |
@ G652 fiber >40km Attenuation coefficient 0.20dB/km |
||
|
Total Pump out power |
700 |
mw |
@/pump 500mw setting, Two pumps |
||
|
Input signal threshold |
0 |
dBm |
General specification
|
Item |
Min |
Typ |
Max |
Units |
Note |
|
Polarization dependence gain |
0.5 |
dB |
|||
|
Polarization mode dispersion |
0.5 |
ps |
|||
|
Return Loss |
45 |
dB |
UPC connector |
Pigtail
|
Function |
connector |
Length(cm) |
description |
|
Input |
LC/UPC |
50±5 |
900um,tight,white |
|
Output |
LC/UPC |
50±5 |
900um,tight,white |
Electrical interface
DRA module electrical connector is 50 pin male, DC3-50p 2.54mm
|
NO. |
Pin Name |
NO. |
Pin Name |
|
1 |
+5.0V |
2 |
+5.0V |
|
3 |
+5.0V |
4 |
+5.0V |
|
5 |
+5.0V |
6 |
+5.0V |
|
7 |
+5.0V |
8 |
+5.0V |
|
9 |
+5.0V |
10 |
GND |
|
11 |
GND |
12 |
GND |
|
13 |
GND |
14 |
GND |
|
15 |
GND |
16 |
GND |
|
17 |
GND |
18 |
GND |
|
19 |
RX (LVTTL) |
20 |
TX (LVTTL) |
|
21 |
NC |
22 |
NC |
|
23 |
NC |
24 |
NC |
|
25 |
GND |
26 |
GND |
|
27 |
Signal Power Alarm |
28 |
Reflection Power Alarm |
|
29 |
Pump Current Alarm |
30 |
Pump Temp Alarm |
|
31 |
Case Temp Alarm |
32 |
RESET |
|
33 |
GND |
34 |
GND |
|
35 |
GND |
36 |
GND |
|
37 |
GND |
38 |
GND |
|
39 |
GND |
40 |
GND |
|
41 |
GND |
42 |
+5.0V |
|
43 |
+5.0V |
44 |
+5.0V |
|
45 |
+5.0V |
46 |
+5.0V |
|
47 |
+5.0V |
48 |
+5.0V |
|
49 |
+5.0V |
50 |
+5.0V |
Note：Alarm active is high 3.3 V
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