How many 10G can 40ch AAWG Mux Demux transmit by single fiber?
1308 2021-11-14
One of HTF customer ask, can we support to design single fiber DWDM solution for 80km?
HTF: Of course we can support and design. 
Your need point to point DWDM single fiber solution
The fiber loss for 80km is ? 
Need transmit how many data rate? 

Customer:  Yes, 20dB loss for 80km, 10x10G
What’s the max for your solution can transmit? 
HTF: OK. We will choose 40ch DWDM mux demex, max 16 channel x 10G.  

Customer: Why 40ch DWDM mux demux only can transmit 16 channel x 10G?
HTF: 
(1)As it is single fiber, for 80km, need use BIDI edfa. 
(2)Under the situation of using 40ch dwdm mux demux module. (C21-C60)
(3)BIDI edfa only can transmit the corresponding wavelength.
Customer cannot use use C37-C44 channels, is related with single fiber amplifier, C37-C44 are not in single fiber amplifier wavelength range. 

single fiber amplifier only support the wavelength range is: 
EDFA-Red 1547-1561nm ( DWDM mux&demux and DWDM optical module use C21-C36 )
EDFA-Blue 1528-1543nm ( DWDM mux&demux and DWDM optical module use C45-C60 )

Channel
On ITU grid in C-band
Channel
On ITU grid in C-band
Frequency (THz)
Wavelength (nm)
Frequency (THz)
Wavelength (nm)
C21
192.1
1560.61
C41
194.1
1544.53
C22
192.2
1559.79
C42
194.2
1543.73
C23
192.3
1558.98
C43
194.3
1542.94
C24
192.4
1558.17
C44
194.4
1542.14
C25
192.5
1557.36
C45
194.5
1541.35
C26
192.6
1556.55
C46
194.6
1540.56
C27
192.7
1555.75
C47
194.7
1539.77
C28
192.8
1554.94
C48
194.8
1538.98
C29
192.9
1554.13
C49
194.9
1538.19
C30
193
1553.33
C50
195
1537.4
C31
193.1
1552.52
C51
195.1
1536.61
C32
193.2
1551.72
C52
195.2
1535.82
C33
193.3
1550.92
C53
195.3
1535.04
C34
193.4
1550.12
C54
195.4
1534.25
C35
193.5
1549.32
C55
195.5
1533.47
C36
193.6
1548.51
C56
195.6
1532.68
C37
193.7
1547.72
C57
195.7
1531.9
C38
193.8
1546.92
C58
195.8
1531.12
C39
193.9
1546.12
C59
195.9
1530.33
C40
194
1545.32
C60
196
1529.56
The red color C37-C44 can not use in single fiber EDFA.

Customer: Thanks for you detail explain. Can you send me your solution for our customer to check? 

HTF: Yes, Engineer had design the solution, use 40km type DWDM optical module, can help you save cost.  The following is the solution for you to check. 

DWDM Single fiber solution from HTF
80km 20db Loss, ues 40km optical module
Item
Product
Model
Specification
A (pcs)
B(pcs)
Sub Total
(pcs)
1
Chassis
HT6000-CH04
1U,19ich, 3 business slots + 1 network management slot, Dual power AC or DC-48V optional
1
1
2
2
Mux/ Demux
AAWG40
40CH passive MUX DEMUX card
1
1
2
3
EDFA
PA16/G25-R
Power amplifier card, Maximum output 16dBm, gain 25dB,Amplify the red light
 
1
1
4
PA16/G25-B
Pre-amplifier card, Maximum output 16dBm, gain 25dB,Amplify the blue light
1
 
1
5
Optical Module
DWDM-SFP-10G-40
SFP+ 10G DWDM 40km (C21~C36+C45~C60)
16
16
32
6
DCM
DCM60
Dispersion compensator, compensates 60km
1
1
2
7
NMS
NMS
Network management card, 2xSFP +4xLAN+CLI
1
1
2

If you have any other questions, Welcome to contact HTF team. Whatsapp: 008618123672396    support@htfuture.com