1000BASE-LCWDM optical specifications

Overview

The 1000BASE-LCWDM PTMs can be used for Coarse Wavelength Division Multiplexing (CWDM) GbE service over Single-Mode Fiber (SMF). The 1000BASE-LCWDM PTMs are hardened for extended temperature applications.

System specifications

The following are the 1000BASE-LCWDM system specifications:

• Optical Line Rate: 1.25 Gb/s (±100 ppm)

• Optical Line Coding: 8B/10B

• Fiber Type: 10 μm SMF

• Minimum Range: 2 to 96,000 meters

• Temperature range: Extended temperature (−5°C to +85°C)

Transmitter specifications

The 1000BASE-LCWDM optical transmitter meets the specifications listed in the following table.

Table 10-46: 1000BASE-LCWDM transmit specifications

Description	1000BASE-LCWDM
Transmitter type	Distributed Feed-Back (DFB) Laser
Signaling speed (range)	1.25 GBd (±100 ppm)
Wavelength (λ)	Refer to Table 10-47, 1000BASE-CWDM PTM wavelengths.
Minimum Wavelength	λc −7 nm
Maximum Wavelength	λc +7 nm
Trise/Tfall (max; 20%−80% response time)	0.26 ns
Maximum Spectral Width (Δλ20)	1 nm
Average launch power (max)	+5 dBm
Average launch power (min)	−1.0 dBm
Average launch power of OFF transmitter (max)	−40 dBm
RIN (max)	−120 dB/Hz

Table 10-47: 1000BASE-CWDM PTM wavelengths

Apparatus Code	Channel #	Wavelength
SGEC47EL	47	1471 nm
SGEC49EL	49	1491 nm
SGEC51EL	51	1511 nm
SGEC53EL	53	1531 nm
SGEC55EL	55	1551 nm
SGEC57EL	57	1571 nm
SGEC59EL	59	1591 nm
SGEC61EL	61	1611 nm

Receiver specifications

The 1000BASE-LCWDM receiver meets the specifications defined in the table below.

Table 10-48: 1000BASE-LCWDM receive specifications

Description	1000BASE-LCWDM
Signaling speed (range)	1.25 GBd (±100 ppm)
Average receive power (max)	−9.0 dBm
Receive sensitivity	−29.0 dBm
Return loss (min)	24.0 dB

Link budgets

The worst-case power budget and link penalties for a 1000BASE-LCWDM channel are shown in the table below.

Table 10-49: 1000BASE-LCWDM link budgets and penalties

Parameter	1000BASE-LCWDM
Maximum Channel Insertion Loss	28.0 dB
Minimum Channel Insertion Loss	14.0 dB
Maximum Dispersion	1600 ps/nm
Optical Path Penalty	2.0 dB
Target Distance 1	96 km

Notes:

1. The target distance assumes that passive optical units are not being used.