1550 nm Directly Modulated Laser Transmitter (DMLT-1550)

Data Sheet

The Optilab DMLT-1550 series laser transmitters are a reliable and cost-effective solution for HFC, RFoG, PON, and deep fiber applications.

Product Overview

The Optilab DMLT-1550 series laser transmitters are a reliable and cost-effective solution for HFC, RFoG, PON, and deep fiber applications. Using a dispersion compensated analog 1550 nm DFB laser module and an
advanced pre-distortion RF drive circuit, DMLT-1550 transmitters deliver 50+ dB of CNR while maintaining high CSO, CTB performance. Available in a Standard Reach (SR) option with a standard transmission range of
20 km, or an Extended Reach (ER) option with a transmission range of 40 km, the DMLT-1550 is the best cost/performance ratio in the industry. The DMLT-1550 series is available with output power levels from +6 dBm
to +10 dBm, and the 1550 nm wavelength can be easily amplified by any EDFA. Designed to be digitally ready, it can be loaded with 77 NTSC analog channels with an additional 60 QAM channels. Contact Optilab for more information.

Applications

  • HFC
  • PON
  • RFoG
  • Deep fiber applications
  • For RUS/USDA projects

Features

  • Analog-modulated 1550 nm DFB laser
  • Transmission range up to 40 km
  • Pre-distortion circuit minimizes CSO & CTB
  • Output power level: +6 dBm to +10 dBm
  • Automatic Gain and Manual Gain Control
  • 77 channel NTSC plus 60 QAM channels
  • 45 MHz to 870 MHz bandwidth
  • 1 GHz available
  • 3 year warranty standard

Feature Name Description
General Specifications
Laser Wavelength Range 1550 nm ± 15 nm, Custom wavelengths available
Transmission Range -ER model up to 40 km -SR model up to 20 km
Output Power Level +6 dBm to +10 dBm
Number of Outputs 1 output standard, multiple output available
Optical Return Loss 50 dB min.
Carrier to Noise Ration (CNR) 52 dB typ. @ 0 dBm
Composite Second Order (CSO) Distortion -60 dBc max.
Composite Triple Beat (CTB) Distortion -62 dBc max.
RF Test Port Ratio -20 dB
AGC Adjustment Range 6 dB (optional)
Input RF Power Level 13 to 18 dBmV per channel
Frequency Range 45 MHz to 870 MHz
Flatness in Frequency Range ±0.75 dB
Input Impedance 75 Ω
Input RF Return Loss 16 dB min.
Mechanical Specifications
Operation Temperature Range 0°C to +50°C
Storage Temperature Range -40°C to +70°C
Power Supply 80 – 240 V, 43 – 63 Hz AC
Power Consumption 30 W max.
Housing Dimensions 1RU 19”(W) x 14”(D) x 1.75”(H)
Control / Monitoring DFB Laser Temperature and Current
Display Output Power Level, TEC temperature
Alarm Over Temperature , Over Current
Optical Connectors SC/APC or Customer Specified