SFW-C Coarse Wavelength Division Multiplexer (CWDM)

Couplers, Splitters Wavelength division multiplexers (WDM, CWDM, DWDM)

SFW-C series coarse wavelength division multiplexer and demultiplexer (CWDM) modules are reliable, cost effective solutions to multiservice applications. They multiply the capacity of existing singlemode fibers, by combining up to 16 ITU-T G.694.2 compatible (20 nm) channels in metropolitan, access and enterprise networks and for Cable TV applications. They are a low cost approach for systems that use uncooled laser sources, and are an alternative to more expensive DWDM components based on 100 GHz or 200 GHz channel spacing.

High port isolation
Custom defined specifications
Low insertion loss
Low polarization dependent loss
Transmission with high directivity
Wide spectral channels
Environmentally stable
Wide range of packaging types – min. bend radius protection

Feature	Specification	Feature	Specification
Channel spacing	20 nm	PDL	≤ 0.1 dB
Pass bandwidth	Typ. 14 nm	Max. optical power	300 mW
Pass band flatness	0.3 dB	Operating temperature (Conditioned by the cable type)	-10 to +70 °C
Min Isolation	≥ 40 dB non-adjacent channel ≥ 30 dB adjacent channel	Storage temperature (Conditioned by the cable type)	-40 to +85 °C
Return loss	≥ 50 dB	Package dimensions	Refer to ord. code
Directivity	≥ 50 dB

Insertion loss (dB)* (without connectors)

4 Channels		CWDM 4 + E		CWDM 6 CH		CWDM 6 + E		CWDM 8 CH		CWDM 8 + E		CWDM 16 + E
Typ.	M+D	Typ.	M+D	Typ.	M+D	Typ.	M+D	Typ.	M+D	Typ.	M+D	Typ.	M+D
1.5	2.5	1.7	3.0	2.1	3.7	2.3	4.1	2.5	4.5	2.7	4.9	4.8	8.8

Compact CWDM (Low Loss) (without connectors)

Channel Number	4	8	8 (+E1)	8 (+E2)
Insertion Loss (dB)	1.0	1.5	1.5	1.5
Maximum Ripple in Passband (dB)	0.5
Maximum Polarization Depend Loss (dB)	≤0,2
Maximum Polarization Mode Dispersion (ps)	0,10(GD)
Maximum Power Handling (mW)	500

Block diagram of typical applications:

Packaging variants:


CM4 box with cable outputs	MPIC Wall mount box	3U Rack mount chassis for 12x CAPM cassettes		1U 19” frame – MCNP type

Diagrams with examples of connection and codes:
CWDM - One fiber

CWDM - Two fibers

Optical networks
Telecommunication systems
Data communication systems
CATV

(2x)¹SFW-C

XXX

YYY

ZZZ/ZZZ⁴

W(+E)⁵(-LL)⁶

N - Number of channels

XXX - Type of device

Sum (Ʃ) / Wavelength (λ)

1-16

MUX

Connector types

DEMUX

UPC

FC/UPC

M+D²

MUX+DEMUX

NPC

FC/APC

ADD

USC

SC/UPC

DROP

NSC

SC/APC

A+D

ADD+DROP

NE2

E2000/APC Grade C

NE2P xx

E2000/APC Grade B, A, A+

Package version I (basic)³

ULC

LC/UPC

CM1

Cable type, metal box (up to 3 ports), 100x15x9 mm

NLC

LC/APC

CM3

Cable type, metal box (up to 5 ports), 100x80x10 mm

USL

ST/UPC

CM4

Cable type, metal box (up to 9 ports), 140x110x10 mm

No connectors

CM5

Cable type, metal box, 140x110x20 mm

Package version II (optional)

W Wavelengths shortcut list

YYY => Part number of relevant ODF (e.g. MCNP, TMVJ, MCPJ)

1270 nm

1450 nm

CAPM

OPTOKON cassette

1290 nm

1470 nm

MPIC

Wall mount MPIC unit

1310 nm

1490 nm

LGX

LGX box (customized by a client)

1330 nm

1510 nm

Note:

1350 nm

1530 nm

Application – „2x“ = 2 Fibers variant, No digit = 1 Fiber variant

1370 nm

1550 nm

MUX and DEMUX in one pack, only for 2 fiber variant

1390 nm

1570 nm

2.8 mm cable diameter, standard outputs length – 1 m

1410 nm

1590 nm

First “Z” defines Ʃ connector/second “Z” defines λ connectors

1430 nm

1610 nm

Other connector types on request

Expand port, 1310 ± 7 nm

Enumerate wavelengths (W = wavelength)

Expand port, 1310 ± 50 nm

Examples: 31,49,51,55

47,49,51,53 +E2

Low Loss module = Compact CWDM with the lowest IL ≤1.5dB

SFW-C Coarse Wavelength Division Multiplexer (CWDM)_2020-06-22.pdf