Light Link Series 2 LT1550. Laser Transmitter with Erbium Doped Fibre Amplifier. Description. Features

Transcription

1 Description The Light Link Series 2 optical transmitter model employs a high performance thermally stabilised, DFB, low-chirp, isolated laser to transmit CATV signals. Operating on a specific optical wavelength in the ITU- DWDM grid, the unit suits single mode optical fibre networks with or without dense wavelength division multiplexing (DWDM). The unit can optionally be equipped with an integrated erbium doped fibre amplifier (EDFA) for fibre to the home (FTTH) applications. Designed for high channel loading and superior performance, this transmitter can achieve distances of up to 10 km on standard fibres and up to 30 km on 1550 nm dispersion shifted fibres. optical transmitters incorporate a comprehensive alarm and status monitoring system of all laser operating parameters such as DC Laser Bias Current, Cooler Current and Optical Output Power. The data is available simultaneously on a front panel LCD display, on a USB connector, and optionally via a HTTP/SNMP network module. Features Analog InGaAsP DFB low-chirp laser with optical isolator and thermoelectric cooler. Handles legacy analogue cable television as well as digital DVB-T or DVB-C formats. 45 MHz to 1000 MHz forward path RF amplifier with automatic gain control (AGC) for a constant optical modulation index (OMI). Automatic Peltier thermo-cooler control and automatic laser power control for constant laser temperature and optical output. Option for integrated Erbium Doped Fibre Amplifier (EDFA) to achieve the very high optical power levels as required for FTTH systems. Self-contained 19 subrack 1 RU with integrated universal mains power supply. Backlit LCD display provides status monitoring and control. Front panel mounted USB craft port with optional Ethernet port on the rear panel for SNMP/HTTP network management. PBN. - Datasheet V5e - Released - 21 Sep 07.doc - Page 1 of 5

2 Specifications Optical and RF Optical wavelength: Optical output power options: Optical return loss: Optical connectors: Laser RIN: RF bandwidth: RF input level: RF flatness: RF gain control: RF input: RF test point: One ITU grid channel in the 1550 nm range 6, 8, 10, 20, 40, 80, 100, 120, 160, 200, 250 mw > 60 db SC/APC, E2000/APC, FC/APC < -155 db/hz 45 MHz to 1000 MHz 25 dbmv for 4% OMI ± 0.75 db -15 db to +5 db 75 Ω, SCTE F-type -20 db±1db, 75 Ω Mini-SMB General Power: Operating temperature: Dimensions: (HxWxD) Ship size: (HxWxD) Weight: Ship weight: RF connectors: Craft port: Network port: (optional) 90 Vac to 264 Vac 50 Hz to 60 Hz 0 C to 45 C 44 x 483 x 360 mm 120 x 510 x 490 mm 5 kg 5.5 kg SCTE F-type USB on front panel 10BaseT Link Performance 64 PAL B/G, D channels > 62 dbc 6, 8, 10 mw 42 CENELEC channels (as per EN ) > 55 dbc 79 NTSC CW channels + Digital > 54 db This link performance is measured at 0 dbm optical input, 1550nm 10 km SMF and 4% OMI for 45~870 MHz. 20, 40, 80, 100, 120, 160, 200, 250 mw 64 PAL B/G, D channels > 52 db > 62 dbc 42 CENELEC channels (as per EN ) > 52 db > 55 dbc 79 NTSC CW channels + Digital This link performance is measured at 0 dbm optical input, 1550nm 10 km SMF and 4% OMI for 45~870 MHz. PBN. - Datasheet V5e - Released - 21 Sep 07.doc - Page 2 of 5

3 Order Details Model Number: -[V]-[W]-[X]-[Y]-[Z] V Optical output power (mw) mw (7.78 dbm) mw (9 dbm) mw (10 dbm) mw (13 dbm) mw (16 dbm) mw (19 dbm) mw (20 dbm) mw (21 dbm) mw (22 dbm) mw (23 dbm) mw (24 dbm) W ITU grid channel (Optical wavelength)* THz ( nm) THz ( nm) THz ( nm) THz ( nm) THz ( nm) THz ( nm) THz ( nm)** THz ( nm) THz ( nm) * Not all wavelengths may be available at time of order. Contact PBN for details if a specific wavelength is required. ** Default channel if nothing else specified X Number of optical outputs F1 One optical output port*** F2 Two optical output ports*** F4 Four optical output ports*** F5 Five optical output ports*** F6 Six optical output port*** F8 Eight optical output ports Y Z Optical connectors SC SC/APC optical connector E E2000/APC optical connector FC FC/APC optical connector (narrow key) NMS3 Network Management USB USB port only SNMP USB port and Ethernet port for SNMP/HTTP network monitoring. *** In cable television applications no more than 50 mw (17 dbm) launch level per fibre line should be planned to avoid excessive Stimulated Brillouin Scattering (SBS) in the connected fibres. Back-scatter can significantly reduce CNR and CSO performance. Hence the models with 80, 100, 120, 160, 200 and 250 mw power output should be ordered with the appropriate split, keeping the power per port at a more manageable and safe level. PBN. - Datasheet V5e - Released - 21 Sep 07.doc - Page 3 of 5

4 Block Diagram PBN. - Datasheet V5e - Released - 21 Sep 07.doc - Page 4 of 5

5 Product Examples Preferred models for system planning F1-SC-SNMP F1-SC-SNMP F1-SC-SNMP F1-SC-SNMP F1-SC-SNMP F2-SC-SNMP F2-SC-SNMP F4-SC-SNMP F4-SC-SNMP F5-SC-SNMP F6-SC-SNMP F8-SC-SNMP Laser transmitter 45~870MHz 1550nm 6mW 8dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 8mW 9dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 10mW 10dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 20mW 13dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 40mW 16dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 80mW 2x16dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 100mW 2x17dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 160mW 4x16dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 200mW 4x17dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 200mW 5x16dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 250mW 6x16dBm SC/APC 90~260Vac SNMP Laser transmitter 45~870MHz 1550nm 250mW 8x15dBm SC/APC 90~260Vac SNMP PBN. - Datasheet V5e - Released - 21 Sep 07.doc - Page 5 of 5