Chapter 10: Dual Optical S-4.1 Module, S4.1-2-LC

Table Of Contents

Dual Optical S-4.1 Module, S4.1-2-LC

10.1  Module Description

10.1.1  Power Consumption

10.2  External Interface

10.2.1  Connector Type

10.2.2  Compliance

10.2.3  Optical Power Budget S4.1-2-LC Two-Fibre

Dual Optical S-4.1 Module, S4.1-2-LC

10.1  Module Description

The module (see Figure 10-1) contains two optical STM-4 interfaces that meets the S-4.1 specification in ITU-T G.957. The physical connector is a LC connector.The module only supports TDM traffic.

10.1.1  Power Consumption

The module power consumption is 9,5 W.

10.2  External Interface

The interface ia an optical STM-4 short haul interface, according to clause 5 ITU-T G.957 The definitions of optical parameters and reference points S and R refer to ITU-T G.957. Reference point S means transmit direction while R is the receive direction of the fibre. The following descriptions refer to both Single Mode fibre and Multi Mode fibre.

10.2.1  Connector Type

The physical connector is a LC connector

Figure 10-1 Dual Optical S-4.1 Module, S4.1-2-LC.

10.2.2  Compliance

Optical Interfaces compliance is described in Table 10-1.

Table 10-1 Optical Interface Compliance

Standard

Comment

ITU-T G.652

Single Mode Fibre specification 10/125

ITU-T G.651

Multi Mode Fibre specification 50/125 痠

IEC 793-2

Multi Mode Fibre specification 62.5/125 痠

ITU-T G.707

Optical line signal

ITU-T G.783

RX pull-in and hold range

ITU-T G.813

Optical output jitter

ITU-T G.825

Optical input jitter

ITU-T G.957

Optical spectrum,

Optical output power,

Optical eye diagram,

Optical extinction ratio.

10.2.3  Optical Power Budget S4.1-2-LC Two-Fibre

The Optical Power Budget for STM-4 S4.1 SH and LH is listed in Table 10-2.

Table 10-2 Optical Power Budget, STM-4 S4.1 SH and LH

Parameter

Short-Haul

Types of fibre:

ITU-T Rec. G.652 SM

10/125

痠

ITU-T Rec. G.651 MM

50/125

IEC 739-2 MM

62.5/125

Modulation rate on optical line

622 080

kbit/s

Wavelength range

1274 - 1356

nm

Transmitter at reference point S

Source type

MLM

Spectral characteristics (max. RMS width)

2.5

nm

Mean launched power (max.)

-8

dBm

Mean launched power (min.)

-15

dBm

Min. extinction ratio

8.2

dB

Optical path between S and R

Attenuation range

0 - 12

dB

Max. tolerable dispersion

200

ps/nm (SM Fibre)

Min. optical return loss

NA

Max. discrete reflectance between S and R

NA

Receiver at reference point R

Min. sensitivity (BER < 1 in 1010)

-28

dBm

Min. overload

-8

dBm

Max. optical path penalty

1

dB

Max. reflectance at R

NA

Standard	Comment
ITU-T G.652	Single Mode Fibre specification 10/125
ITU-T G.651	Multi Mode Fibre specification 50/125 痠
IEC 793-2	Multi Mode Fibre specification 62.5/125 痠
ITU-T G.707	Optical line signal
ITU-T G.783	RX pull-in and hold range
ITU-T G.813	Optical output jitter
ITU-T G.825	Optical input jitter
ITU-T G.957	Optical spectrum, Optical output power, Optical eye diagram, Optical extinction ratio.

Parameter	Short-Haul
Types of fibre:	ITU-T Rec. G.652 SM	10/125	痠
	ITU-T Rec. G.651 MM	50/125
	IEC 739-2 MM	62.5/125
Modulation rate on optical line		622 080	kbit/s
Wavelength range		1274 - 1356	nm
Transmitter at reference point S
Source type		MLM
Spectral characteristics (max. RMS width)		2.5	nm
Mean launched power (max.)		-8	dBm
Mean launched power (min.)		-15	dBm
Min. extinction ratio		8.2	dB
Optical path between S and R
Attenuation range		0 - 12	dB
Max. tolerable dispersion		200	ps/nm (SM Fibre)
Min. optical return loss		NA
Max. discrete reflectance between S and R		NA
Receiver at reference point R
Min. sensitivity (BER < 1 in 1010)		-28	dBm
Min. overload		-8	dBm
Max. optical path penalty		1	dB
Max. reflectance at R		NA