Brief Introduction Of DWDM Technology

- Oct 23, 2019-

1. Introduction of DWDM

DWDM (Dense Wavalength Division Multiplexing), is a technology that use multiple lasers to simultaneously transmit different signals of different wavelengths on a single fiber. DWDM uses the C-Band (1530 nm-1565 nm) transmission window but with denser channel spacing.


2. Advantages of DWDM

2.1 From Electrical networks to optical networks

DWDM technology lay the foundation for evolution from  electrical network to optical netowrk. Traditional electronic networking can not directly perform multiplexing, switching, or routing on optical Layer. It needs Photoelectric Conversion Equipment to convert the optical signal into an electrical signal and then convert the electrical signal back to the optical signal.


The optical network with DWDM as the mechanism can directly operate signal in the optical layer to solve the above problems.  Therefore, it overcomes the traditional transmission problems and brings the concept of "Virtual fibre" and makes the most efficient use of the existing optical fiber.


2.2 Network diversification

DWDM has no relation to Bite rate and Protocols. Which means it can provide network transmission that are completely independent of the form of the service. 


2.3 Cost reducing

Because the signal assignment or scheduling in the optical layer of DWDM is simpler and more efficient than the traditional bandwidth scheduling in the electrical layer, so it can reduce the cost.


2.4 Increasing transmission distance and network capacity

The biggest problem of high-speed STM-64 TDM (Time Division Multiplexing) transmiting is that ther dispersion of optical fiber is severe, which has a degrading effect on the transmitted optical signal.

The multiplex of STM-64 usually has restrictions on the frequency and format of the tributary signal, however the multiplex of DWDM is almost unlimited. Any signal formats such as PDH, ATM, SDH, and IP can be input, more flexibility of network transmission.

In Addressing the increasing requirement of bandwith of users and promoting network capacity, DWDM provide different option in technology.


Sky Optics provide DWDM products including 1G and 10G DWDM optical transceivers, DWDM MUX DEMUX devices


Model

Package

Data Rate

Wavelength

LD

PD

Distance

Connector

Fiber Type

SP-Dxx2G-A2DC

SFP

2.488Gb/s

ITU-T G.692 DWDM

EML DWDM

APD

120Km

Duplex LC

SMF

SP-Dxx2G-80DC

SFP

2.488Gb/s

ITU-T G.692 DWDM

EML DWDM

APD

80Km

Duplex LC

SMF

SP-Dxx2G-40DC

SFP

2.488Gb/s

ITU-T G.692 DWDM

EML DWDM

PIN

40Km

Duplex LC

SMF

SP-Dxx1G-A2DC

SFP

1.25Gb/s

ITU-T G.692 DWDM

EML DWDM

APD

120Km

Duplex LC

SMF

SP-Dxx1G-80DC

SFP

1.25Gb/s

ITU-T G.692 DWDM

EML DWDM

APD

80Km

Duplex LC

SMF

SP-Dxx1G-40DC

SFP

1.25Gb/s

ITU-T G.692 DWDM

EML DWDM

PIN

40Km

Duplex LC

SMF

SPP-Dxx92-80x

SFP+

10Gb/s

ITU-T G.692

EML DWDM

APD

80Km

Duplex LC

SMF

SPP-Dxx92-40x

SFP+

10Gb/s

ITU-T G.692

EML DWDM

PIN

40Km

Duplex LC

SMF

SPP-Dxx16-40C

SFP+

14.025Gb/s

ITU-T G.692

EML DWDM

PIN

40Km

Duplex LC

SMF

SX-Dxx92-80x

XFP

10Gb/s

ITU-T G.692

EML DWDM

APD

80Km

Duplex LC

SMF

SX-Dxx92-40x

XFP

10Gb/s

ITU-T G.692

EML DWDM

PIN

40Km

Duplex LC

SMF

SX2-Dxx92-80C

X2

10Gb/s

ITU-T G.692

EML DWDM

APD

80Km

Duplex SC

SMF

SX2-Dxx92-40C

X2

10Gb/s

ITU-T G.692

EML DWDM

PIN

40Km

Duplex SC

SMF

SXK-Dxx92-80C

XENPAK

10Gb/s

ITU-T G.692

EML DWDM

APD

80Km

Duplex SC

SMF

SXK-Dxx92-40C

XENPAK

10Gb/s

ITU-T G.692

EML DWDM

APD

40Km

Duplex SC

SMF



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