1955 F/R/W Coaxial DFB Laser Diode 1550 nm CWDM 5 MHz – 4000 MHz DATASHEET | APRIL 2015 FIBER OPTICS EMCORE’s Model 1955 DFB lasers offer a low cost solution for linear fiber optic links. These components can be cooled with external thermo-electric coolers for high stability, or run without TEC’s to reduce power consumption. The DFB laser builds upon EMCORE and Ortel’s long history of high performance, leading-edge designs in CATV, wireless, and high-speed digital applications. The laser diode devices are packaged in a compact hermetic assembly together with monitor photodiode and isolator for flexible integration into various transmitter configurations. Performance Highlights Applications Parameters Video Signal Distribution in HFC and FTTx Nodes Operating Case Temperature Range Signal Distribution in L-Band, Wireless Remote and DAS Links Optical Output Power High Linearity, Low Power Fiber Links Frequency Range -40 - 85 °C - 4.9 5.9 dBm 8.9 5 - 4000 MHz 51 - - dB Standard Linearity - - -55 dBc Enhanced Linearity - - -57 Standard Linearity - - -65 Enhanced Linearity - - -68 45 - - dB 30 - - dB (1) Composite Triple Beat (79 channels) RoHS Compliance Optical Return Loss High Slope Efficiency up to 0.3 mW/mA Side Mode Suppression Ratio, CW (1) (1) (1) Single and Double Optical Isolator Monitor Photodiode Units 6 Linear DFB Laser Design Bandwidth 5 – 4000 MHz Max 5 Composite Second Order (79 channels) Output Power Up to 6 dBm Available Typical 3 (1) Carrier-to-Noise Ratio (79 channels) Features Min (1) 1. Performance at Tcase = 25°C | REV 2015.04 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. dBc 1955 F/R/W Coaxial DFB Laser Diode 1550 nm CWDM 5 MHz – 4000 MHz FIBER OPTICS DATASHEET | APRIL 2015 Absolute Maximum Ratings1 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. Parameters Symbol Condition/Notes Min Max TSTG Non-Operating -40 85 o o Storage Temperature Unit C Operating Case Temperature TOP Continuous -40 85 Laser Diode Forward Current IOP CW - 150 mA Laser Diode Reverse Voltage VR Continuous - 1.0 V Photodiode Forward Current IMPD Continuous - 2 mA Photodiode Reverse Voltage VMPD,R Continuous - 10 V PIN 60 Seconds - 62 Average RF Input Power Lead Soldering Temperature/Time Relative Humidity C dBmV o - - - 260/10 RH Continuous - 85 % - Human Body Model -500 +500 V ESD C/sec 1. Absolute maximum data are limited to system design only; proper device performance is not guaranteed over rating listed above. Operation beyond these maximum conditions may degrade device performance, lead to device failure, shorter lifetime, and will invalidate the device warranty. Electrical/Optical Characteristics Parameters Symbol Conditions/Notes Min Typ Max Unit PO 1955R opt model: 3-6 dBm 1955W opt model: 3-6 dBm 1955F opt model: 3-6 dBm 3 5 6 - 4.9 5.9 8.9 dBm Threshold Current ITH Tcase = 25ºC - 8 15 mA Laser Bias Current IOP Forward Voltage VF Slope Efficiency Optical Output Power Thermal Slope Efficiency Laser Input Impedance MPD Current MPD Dark Current Relative Intensity Noise - - 80 mA Iop - 1.2 1.8 V SE Tcase = 25ºC, Iop 0.07 - 0.3 mW/mA TSE SE(Tc)/SE(25ºC) Tcase = -20ºC to 85ºC 0.4 - 1.2 - Z - 2 4 8 IMPD VMPD = 5V, Iop 50 - 2000 mA ID VMPD = 5V, Iop = 0 Tcase = 25ºC - - 50 nA RIN CW, Iop, Tcase = 25ºC 5 MHz - 1002 MHz - - -150 dB/Hz Ω | REV 2015.04 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. 1955 F/R/W Coaxial DFB Laser Diode 1550 nm CWDM 5 MHz – 4000 MHz FIBER OPTICS DATASHEET | APRIL 2015 Electrical/Optical Characteristics (continued) Parameters Symbol Min Typ Max Unit -1 - +1 dB 45 30 - - dB Iop - 0.1 1.0 nm SMSR Iop 30 45 - dB ORL Tcase = 25ºC 35 - - dB Rise Time tr Tcase = 25ºC - 0.05 0.10 ns Fall Time tf Tcase = 25ºC - 0.10 0.15 ns ER 10 log (2.omW/Pf (Ith)) 10 - - dB Symbol Conditions/Notes Min Typ Max Unit |S21| 47 MHz – 1002 MHz 5 MHz – 4000 MHz - - 1 4 dBp-p 47 MHz < f < 1002 MHz -1 3 dB CNR Iop 51 - - dB Standard Linearity Enhanced Linearity CSO Iop Tcase = 25ºC - - -55 -57 dBc Standard Linearity Enhanced Linearity CTB Iop Tcase = 25ºC - - -65 -68 dBc Conditions/Notes Min Typ Max Unit |S21| 5 MHz - 200 MHz - - 1 dBp-p DSO PF = 3 dBm, OMI = 10% each 2-tone test: f1=13 MHz, f2=19 MHz 20 km of fiber (7.5 dB total loss with connector) DSO measures at 6 MHz, 32 MHz - - -45 -50 dBc DTB PF = 3 dBm, OMI = 10% each 2-tone test: f1=13 MHz, f2=19 MHz 20 km of fiber (7.5 dB total loss with connector) DTO measures at 7 MHz, 25 MHz - - -63 -65 dBc Tracking Error ΔPf Optical Isolation, Tcase = 25ºC ISO Spectral Width (-20 dB) Δλ Side Mode Suppression Ratio Optical Return Loss Extinction Ratio Conditions/Notes IMON = const ER = 10log(PO/2.0) [dB] Double Isolator Single Isolator 1. Referenced to base of TO header. Forward Path RF Characteristics 1955F Performance Parameter Frequency Response Flatness Response Up-tilt 1 1 Carrier-to-Noise Ratio 2,3,4 Composite Second Order Composite Triple Beat 2,3,4 2,3,4 1. Iop, Tcase = 25°C. Test with the laser Input pin matched to a 50Ω system. 2. 3.7% OMI, 79 NTSC unmodulated carriers (50 MHz to 550 MHz). 10 km fiber. 3. Received power = 0 dBm. 4. Iop, Tcase = 25°C. Test with the laser Input pin matched to a 75Ω system. Return Path RF Characteristics 1955R Performance Parameters Frequency Response Flatness Second Order Distortion Standard Linearity Enhanced Linearity Third Order Distortion Standard Linearity Enhanced Linearity 1 Symbol 2 2 1. Iop, Tcase = 25°C. Test with the laser Input pin matched to a 50Ω system. 2. Iop, Tcase = 25°C. Test with laser input pin matched to a 75Ω system. | REV 2015.04 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. 1955 F/R/W Coaxial DFB Laser Diode 1550 nm CWDM 5 MHz – 4000 MHz FIBER OPTICS DATASHEET | APRIL 2015 Wide Bandwidth Path RF Characteristics 1955W Performance Parameters Frequency Response Flatness Input Third Order Intercept 1dB Compression Point 1 2 3 Symbol Conditions/Notes Min Typ Max Unit |S21| 900 MHz – 4000 MHz - - 4 dBp-p IIP3 Standard Linearity, Ibb 30 - - dBm P1dB Ibb 16 - - dBm 1. Iop, Tcase = 25°C. Test with the laser Input pin matched to a 50Ω system. 2. IIP3 is measured at Ibb where Ibb is the bias point at which simultaneously the laser at its best linearity and the optical power is within specification. Test Frequency F1 = 2700 MHz, F2 = 2703 MHz, RF in = 0dBm/frequency. 0 km fiber. 3. Test at 2700 MHz. 0 km fiber. Package Outline Drawing (dimensions are in mm) Mounting Bracket | REV 2015.04 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. 1955 F/R/W Coaxial DFB Laser Diode 1550 nm CWDM 5 MHz – 4000 MHz FIBER OPTICS DATASHEET | APRIL 2015 Reliability/Quality Designed to meet qualification requirements of TelcordiaTM (Bellcore) GR-468-CORE. Schematic and Pinout Schematic and Pinout A Pin Definitions for Pinout A Pin Description 1 LD Anode, Case Ground 2 LD Cathode 3 PD Cathode 4 PD Anode Bottom Laser Safety This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH Class 1M laser product. This device has been classified with the FDA/CDRH under accession number 0220191. All version of this laser are Class 1M 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 μm. Maximum power = 50 mW. Because of size constraints, laser safety labeling (including an FDA class 1M 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 2015.04 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. 1955 F/R/W Coaxial DFB Laser Diode 1550 nm CWDM 5 MHz – 4000 MHz FIBER OPTICS DATASHEET | APRIL 2015 Ordering Code Definitions 1955x - a - bb - c - dddd - ww - yy - z Family Name 1955F: Forward Path 1955R: Return Path 1955W: Wide Bandwidth Distortion Performance a = A: Standard Linearity a = B: Enhanced Linearity (not available for 1955W) Optical Isolator bb = DI: Double Isolator bb = SI: Single Isolator Pinout c = A: Pinout A O-Band Wavelength dddd = 1470:1470 nm dddd = 1490:1490 nm dddd = 1510:1510 nm dddd = 1530:1530 nm dddd = 1550:1550 nm dddd = 1570:1570 nm dddd = 1590:1590 nm dddd = 1610:1610 nm Fiber Length, Optical Connector ww = SA: SC/APC, 900 micron buffer, 1.0 – 1.4 meter Optical Output Power yy = 03: 3 dBm (2 mW) yy = 05: 5 dBm (3 mW) yy = 06: 6 dBm (4 mW) Mounting Bracket z = B: Mounting Bracket z = N: No Mounting Bracket Example 1955F-B-DI-A-1550-SA-06-N: Forward Path Uncooled 1550 nm CWDM Coaxial Laser, Enhanced Linearity, Double Isolator, Pinout A, 1550 nm, SC/APC optical connector, 6 dBm optical power, no mounting bracket. | REV 2015.04 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.