1751A 1550 nm DWDM DFB Laser Module DATASHEET | APRIL 2014 FIBER OPTICS The 1751A laser module is a Dense Wavelength-Division Multiplexing (DWDM) laser for analog applications. It features a distributed feedback chip that has been designed specifically for Radio Frequency (RF) applications. The 1751A laser module has a wide temperature range for reliable performance in harsh node environments and narrow transmitter designs. It also features low adiabatic chirp to maximize signal quality in short and long lengths of fiber. The laser’s excellent inherent linearity minimizes degradation of the broadcast signals caused by quadrature amplitude modulated (QAM) channels. The versatile 1751A laser module reduces cable network architecture fiber needs and lessens equipment reqirements in the hub. Applications Node Capability Narrow Transmitter Housing Networks with Limited Fiber The 1751A is available in a wide range of standard ITU wavelengths. The lasers are offered as either forward-path (40 MHz-1 GHz) or return-path (5 MHz-210 MHz) modules. Architectures Using Separate Optical Wavelengths to Carry Targeted Services Performance Highlights Features Standard ITU Grid Wavelengths Advanced Analog Chip Design Reduces Equipment Requirements in the Hub Telcordia Technologies® 468 Compliant Wide Temperature Range – Stable Even in Harsh Environments Parameters Min Typical Max Units Available Wavelengths (ITU Grid) 1526 - 1563 nm Optical Output Power (multiple versions) 6-16 - - mW Temperature Case Temperature Range -40 - +85 C Return Path 5 - 210 MHz Forward Path 40 MHz - 1 GHz Composite Second Order 50 - - dBc Composite Triple Beat 60 - - dBc Adiabatic Chirp (measured at 500 MHz) 40 - 100 MHz/mA Frequency Range: | REV 2014.04 Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice. 1751A 1550 nm DWDM DFB Laser Module FIBER OPTICS DATASHEET | APRIL 2014 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Operating Case Temperature Storage Temperature Laser Forward dc Current Reverse Voltage Photodiode Laser Reverse Voltage, dc ESD TEC Current RF Input Power Symbol Condition Min Max Units TC continuous -40 +85 C TSTG - -40 +85 C - - - 150 mA VRPD - - 10 V VR - - 1 V - HBM: R = 1500 Ohm, C = 100 pF -500 500 V ITEC continuous -1.7 1.7 A PRFIN IF = IOP - 62 dBmV Electrical/Optical Characteristics Laser Temperature (TL) = 25oC, IF=IOP, Beginning of Life (BOL) Parameter Wavelength Symbol Condition Min Typ Max Unit λOP IF = IOP, T = TOP 1526.0 - 1563.1 nm 1751xxxx-06 version -08 version -10 version -16 version Points measure @ IF = ITH + 20 mA & IF = ITH + 60 mA 6 8 10 16 - - mW mW mW mW 0.16 0.19 - mW/mA 1 Optical Output Power PO Slope Efficiency SE Optical Isolation ISO 30 - - dB Sidemode Suppression Ratio SMSR 35 - - dB Laser Relative Intensity Noise RIN - <-155 - dB/Hz - - 0.04 nm IF = ITH + 70 mA, T = 25 C IF = 60 mA, T = TOP, Tc varied from minmax Wavelength Drift as Case Temp. is Changed Threshold Current ITH - - 20 mA Operating Current IOP - - 120 mA Monitor PD Responsivity rPD VRM=5V 10 - 200 μA/mW Thermistor Resistance RTH TOP=25 C 9.5 10 10.5 KΩ Thermistor Temperature Coefficient TCTH TOP=25 C - -4.4 - %/C TEC Current ITEC -40<TC<+85C IF = 100 mA -1.5 - 1.6 A Fiber Length - May include splice 1.0 1.5 - m Fiber Buffer - - - 900 - m Fiber Core / Cladding - - - 9/125 - m 1. Measured Wavelength = Operating wavelength with a tolerance of ± 0.05 nm. | REV 2014.04 Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice. 1751A 1550 nm DWDM DFB Laser Module FIBER OPTICS DATASHEET | APRIL 2014 RF Characteristic Parameter Symbol Condition Min Typ Max Units F IF = 60 mA 5 40 MHz - 210 1 MHz GHz - IF = 60 mA, TOP = 25 C - ±0.5 ±0.5 - dB dB - 16 - - dB 50 - - dBc 60 - - dBc 51 - - dB 1 Frequency Range Return Path Forward Path 1 Frequency Response Return Path Version 5-210 MHz Forward Path Version 40- 860 MHz RF Return Loss 1 | S11 | Composite Second Order CSO Composite Triple Beat CTB Carrier to Noise Ratio CNR Adiabatic Chirp FM Nominal Input Impedance ZIN IF = IOP Note 2, 3, 4 and 5 IF = IOP Note 2, 3, 4 and 5 IF = IOP Note 2, 3, 4 and 5 IF = 60 mA, T = 25 C, measured at 500 MHz - 40 - 100 MHz/m A - 25 - dB 1. Measured on a 50 resistively matched system. 2. I OP is the bias point at which simultaneously the linearity, the min. optical power and the required operating wavelength, OP are obtained. 3. 8 channel loading with 10% OMI and 40 km fiber length. 4. Receiver thermal noise 8 pA*Hz-0.5, 0.5 mA at Ith+40 mA, photodiode responsivity ~1.1 A/W, noise bandwidth 4.2 MHz 5. Forward band (FB=45-870 MHz): Eight channel CW measurement: channel frequencies set at 553.25, 559.25, 565.25, 571.25, 577.25, 583.25, 589.25, and 595.25 MHz. CTB measured at 553.25, 577.25, and 595.25 MHz. CSO measured at 42 MHz 6. Measured Wavelength = Operating wavelength with a tolerance of + 0.05 nm. Electrical Schematics Figure 1. 1751A Laser Schematic Figure 2. Suggested Matching Circuit for 1751A | REV 2014.04 Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice. 1751A 1550 nm DWDM DFB Laser Module FIBER OPTICS DATASHEET | APRIL 2014 Outline Diagrams (Dimensions are in inches and millimeters) Pin Definitions Pin Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Thermistor Thermistor DC Laser Bias (-) MPD Anode (-) MPD Cathode (+) Thermal Electric Cooler (+) Thermal Electric Cooler (-) Case Ground Case Ground NC Laser Common (+), Case GND Laser Modulation (-) Laser Common (+), Case GND NC | REV 2014.04 Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice. 1751A 1550 nm DWDM DFB Laser Module DATASHEET | APRIL 2014 FIBER OPTICS Laser Safety This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH Class 1 laser product. This device has been classified with the FDA/CDRH under accession number 0220191. All Versions of this laser are Class 3B laser product, tested according to IEC 60825-1:2007/EN 60825-1:2007 Single-mode fiber pigtail with SC/APC connectors (standard). Wavelength = 1.5 m. Maximum power = 30 mW. Because of size constraints, laser safety labeling (including an FDA class 1 label) is not affixed to the module, but attached to the outside of the shipping carton. Product is not shipped with power supply. Caution: Use of controls, adjustments and procedures other than those specified herein may result in hazardous laser radiation exposure. | REV 2014.04 Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice. 1751A 1550 nm DWDM DFB Laser Module FIBER OPTICS DATASHEET | APRIL 2014 Ordering Code Definitions 1751-19-BB-SC-10 Family name 1751A, Analog 1550 nm, DFB, DWDM ITU Wavelength 19 = ch.19 20 = ch.20 22 = ch.22 23 = ch.23 25 = ch.25 26 = ch.26 28 = ch.28 29= ch.29 31 = ch.31 32 = ch.32 34 = ch.34 35 = ch.35 37 = ch.37 38 = ch.38 40 = ch.40 41 = ch.41 43 = ch.43 44 = ch.44 46 = ch.46 47 = ch.47 49 = ch.49 50 = ch.50 52 = ch.52 53 = ch.53 55 = ch.55 56 = ch.56 58 = ch.58 59 = ch.59 61 = ch.61 62 = ch.62 64 = ch.64 21 = ch.21 24 = ch.24 27 = ch.27 30 = ch.30 33 = ch.33 36 = ch.36 39 = ch.39 42 = ch.42 45 = ch.45 48 = ch.48 51 = ch.51 54 = ch.54 57 = ch.57 60 = ch.60 63 = ch.63 Frequency Plan BB = Both Forward and Return Connectors FC = FC/APC SC = SC/APC PG = None (no connector) Optical Power min. 06 = 6 mW 08 = 8 mW 10 = 10 mW 16 = 16 mW | REV 2014.04 Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.