OC-48 PTM optical specifications

Purpose

Alcatel-Lucent 1665 DMX supports SR-1, LR-1, LR-2, CWDM, and DWDM OC-48 Pluggable Transmission Modules (PTMs).

The following circuit packs support OC-48 PTMs

• LNW55

• LNW62

• LNW82

• LNW202

• LNW402

• LNW504

• LNW705

System specifications

The following table lists the system specifications for OC-48 PTM interfaces.

Table 10-60: OC-48 PTM optical system specifications

System information	OC-48 SR-1	OC-48 LR-1	OC-48 LR-2	OC-48 CWDM	OC-48 DWDM
Optical Line Rate	2.488 Gb/s
Optical Line Coding	Scrambled NRZ
Optical Wavelength	1310 nm		1550 nm	See Table 10-62, OC-48/STM-16 CWDM PTM wavelengths.	See Table 10-61, OC-48 DWDM PTM wavelengths.
Performance	SONET Short Reach, SR-1	SONET Long Reach, LR-1	SONET Very Long Reach, LR-2	Coarse Wavelength Division Multiplexing (CWDM), Long Reach	DWDM
Temperature Range	OSP hardened/Industrial (−40°C to 85°C).				Central Office/Commercial (0°C to 70°C).

Table 10-61: OC-48 DWDM PTM wavelengths

Apparatus Code	Channel #	Wavelength (nm)	Frequency (THz)
S2D23C6	23	1558.983	192.30
S2D25C6	25	1557.363	192.50
S2D27C6	27	1555.747	192.70
S2D31C6	31	1552.524	193.10
S2D33C6	33	1550.918	193.30
S2D35C6	35	1549.315	193.50
S2D37C6	37	1547.715	193.70
S2D45C6	45	1541.349	194.50
S2D47C6	47	1539.766	194.70
S2D49C6	49	1538.186	194.90
S2D53C6	53	1535.036	195.30
S2D55C6	55	1533.465	195.50
S2D59C6	59	1530.334	195.90

Table 10-62: OC-48/STM-16 CWDM PTM wavelengths

Apparatus Code	Channel #	Wavelength
S2G7C47LI	47	1471 nm
S2G7C49LI	49	1491 nm
S2G7C51LI	51	1511 nm
S2G7C53LI	53	1531 nm
S2G7C55LI	55	1551 nm
S2G7C57LI	57	1571 nm
S2G7C59LI	59	1591 nm
S2G7C61LI	61	1611 nm

Transmitter specifications

The following table lists the OC-48 PTM transmitter information.

Table 10-63: OC-48 PTM optical transmitter information

Transmitter information	OC-48 SR-1	OC-48 LR-1	OC-48 LR-2	OC-48 CWDM	OC-48 DWDM
Optical Device Temperature Controller	None			Yes
IEC 60825 Laser Classification	Class 1
FDA Laser Classification	Class I
Optical Source	Fabry Perot (FP) Laser	Distributed Feed-Back (DFB) Laser
Faceplate Optical Connector	LC connector

Receiver specifications

The following table lists the OC-48 PTM receiver information.

Table 10-64: OC-48 PTM optical receiver information

Receiver information	OC-48 SR-1	OC-48 LR-1	OC-48 LR-2	OC-48 CWDM	OC-48 DWDM
Optical Detector	InGaAsP PIN	Avalanche Photo Diode (APD)
Faceplate Optical Connector	LC connector

Link budgets

The following table lists the OC-48 PTM link budgets.

Table 10-65: OC-48 PTM optical specifications and link budgets

Parameter	OC-48 SR-1 1	OC-48 LR-1 1	OC-48 LR-2 1	OC-48 CWDM	OC-48 DWDM 1
Minimum Wavelength	1266 nm	1280 nm	1500 nm	λc −7 nm	λc −100 pm
Maximum Wavelength	1360 nm	1335 nm	1580 nm	λc +7 nm	λc +100 pm
Maximum Spectral Width (Δλ20)	NA	1.0 nm	1.0 nm	1.0 nm	NA
Maximum RMS Spectral Width (σ)	4.0 nm	NA	NA	NA	NA
Minimum Side Mode Suppression Ratio	NA	30 dB	30 dB	30 dB	30 dB
Maximum Transmitter Power	−3.0 dBm	3.0 dBm	3.0 dBm	5.0 dBm	4.0 dBm
Minimum Transmitter Power	−10.0 dBm	−2.0 dBm	−2.0 dBm	0 dBm	0 dBm
Maximum Received Power	−3.0 dBm	−9.0 dBm	−9.0 dBm	−8.0 dBm	−9.0 dBm
Minimum Received Power (1x10−10 BER)	−18.0 dBm	−27.0 dBm	−28.0 dBm	NA	NA
Minimum Received Power (1x10−12 BER)	NA	NA	NA	−28.0 dBm	−28.0 dBm
Maximum Negative Dispersion	NA	NA	NA	−300 ps/nm	−300 ps/nm
Maximum Dispersion	NA	NA	1600 ps/nm	1640 ps/nm	2400 ps/nm
Minimum System Gain 2	8.0 dB	25.0 dB	26.0 dB	28.0 dB	28.0 dB
Optical Path Penalty 3	1.0 dB	1.0 dB	2.0 dB	2.5 dB 9	2.0 dB
Minimum Optical Return Loss 4	24.0 dB	24.0 dB	24.0 dB	24.0 dB	24.0 dB
Maximum Receiver Reflectance 4	−27.0 dB	−27.0 dB	−27.0 dB	−27.0 dB	−27.0 dB
Optical Signal to Noise Ratio (OSNR); 1x10 −12 BER, −10 to −20 dBm	NA	NA	NA	NA	See Table 10-66, Noise-limited performance for OC-48 DWDM PTMs
Minimum Loss Budget 5	0 dB	12.0 dB	12.0 dB	13.0 dB	13.0 dB
Maximum Loss Budget 6	7.0 dB	24.0 dB	24.0 dB	25.5 dB	26.0 dB
Target Distance 7	2 km	40 km	80 km	80 km 10	96 km

Notes:

1. All terminology is consistent with GR-253-CORE, Issue 3. All values are worst-case end of life (EOL). Optical specifications meet or exceed equivalent GR-253-CORE requirements.

2. The System Gain is Minimum Transmitter Power minus Minimum Received Power.

3. Optical path penalty includes effects of dispersion, reflection, and jitter that occur on the optical path. The optical path penalty for 1310 nm optics is 1.0 dB maximum. The optical path penalty for the 1550 nm optics is 2.0 dB maximum.

4. Refer to GR-253-CORE for more information about these parameters.

5. For all packs and PTMs where the Minimum Loss Budget (MLB) is 0, no attenuator is required for loopbacks. For all packs and PTMs where the MLB is greater than 0, an attenuator is required. The value of the LBO must be equal to or greater than the MLB.

6. The stated maximum loss budgets are assumed to be worst-case values including losses due to splices, connectors, optical attenuators or other passive optical devices, and any additional cable margin.

7. The target distance assumes no passive optical units are being used.

8. Although not specified, the OC-48 XFPs may tolerate some amount of negative dispersion, approximately −100 ps/nm.

9. CWDM optical path penalty includes effects of dispersion, reflection, and jitter and a 0.3 dB penalty due to optical filters and cross-talk.

10. The CWDM target distance is dispersion-limited at the 1611 nm wavelength and attenuation-limited at the 1471 nm wavelength.

Table 10-66: Noise-limited performance for OC-48 DWDM PTMs

Data Rate	OSNR Required 0 ps/nm dispersion	OSNR Required 2400 ps/nm dispersion	OSNR Required 2400 ps/nm dispersion 120 ps of Differential Group Delay
2.488 Gb/s	16.0 dB	18.0 dB	19.0 dB