PRODUCT INFORMATION 840nm 2B455 Datacom VCSEL Laser Diode This Vertical Cavity SurfaceEmitting Laser is designed for Fibre Channel, Gigabit Ethernet, ATM and general applications. It incorporates a photodiode to monitor the optical power and allow for feedback control. Optical and Electrical Characteristics PARAMETER Fiber-Coupled Power SYMBOL MIN. TYP. MAX. UNIT TEST CONDITION mW IF =12mA mW IF =12mA Optical Power Pfiber Po Slope Efficiency h 200 Beam Divergence Q 15 deg Full Width at 1/e2 Bandwidth fc 2 GHz IF =12mA (dPo/dIF) (3dBel ) Peak Wavelength lp Spectral Width (FWHM) 1.3 (25° C Case Temperature) 0.9 3.0 mW/A IF =12mA 840 860 nm IF =12mA Dl 0.5 1 nm IF =12mA Forward Voltage (Fig.5) VF 1.9 2.2 V IF =12mA Threshold Current Ith 3.5 6 mA Monitor Current Im Monitor Dark Current Id Relative Intensity Noise 830 1.7 20 30 30 RIN (Note 1) -130 mA IF =12mA, VR>1V nA VR=5V dB/Hz IF =12mA, f=1 GHz Note 1: Fiber: 50/125 Graded Index, NA=0.2 or 62.5/125 Graded Index, NA=0.275. An external glass ball lens with 2 mm diameter is required. Ø4.7 Ø2.55 Absolute Maximum Ratings 3.575 PARAMETER SYMBOL LIMIT Storage Temperature Tstg -55 to +1258C Operating Temperature (derating: Fig.4) Top 0 to +708C Electrical Power Dissipation (derating: Fig.4) Ptot 35 mW IF 15 mA IFRM 25 mA VCSEL Reverse Voltage VR 1.5 V Soldering Temperature (2mm from the case for 10 sec) Tsld 2608C 14 0.4 Continuous Forward Current (f<10 kHz) VCSEL Cathode MONITOR Anode VCSEL Cathode Anode 2.5 5.47 CASE NOT CONNECTED All dimensions in mm Peak Forward Current (duty cycle<50%, f>1 MHz) MONITOR Thermal Characteristics BOTTOM VIEW TO-46 Package With Flat Window WARNING: Laser Radiation, avoid exposure to beam. Class 3B laser product, potential eye hazard. Warning labels in each box. 13590.11 1999-04-01 PARAMETER SYMBOL MIN. TYP. MAX. UNIT Thermal Resistance - Infinite Heat Sink Rthjc 500 8C/W Thermal Resistance - No Heat Sink Rthja 800 8C/W dl /dTj 0.06 nm/8C Optical Power - Variation 0 to 708C DP 60.7 dB Threshold Current - Variation 0 to 708C DIth 60.6 mA Temp. Coefficient -Wavelength Europe: Tel (46) 8 58 02 45 00 Fax (46) 8 58 02 01 10 Tel (44) 1291 436180 Fax (44) 1291 436771 America: Tel 1-800-96MITEL Fax (613) 592-6909 Asia: Tel (65) 293 5312 Fax (65) 293 8527 2B455 VCSEL Laser Diode P o vs T FIGURE 1 RELATIVE THRESHOLD CURRENT 100 RELATIVE OPTICAL POWER IFIGURE th vs T 2 % 80 60 40 100 100 80 80 60 40 20 20 0 20 60 40 80 1008C If vs Vf 60 1008C 80 10 40 INFINITE HEAT SINK 30 20 NO HEAT SINK 10 0 0 1 3V 2 FIGURE 4 P o vs U % 100 0 20 40 60 80 OPERATING TEMPERATURE FORWARD VOLTAGE Functional Schematic VCSEL CATHODE COMMON WITH MONITOR ANODE 50 VCSEL MONITOR VCSEL ANODE 0 -15 -10 -5 0 EMISSION ANGLE +5 +10 40 20 MONITOR CATHODE +158 FUNCTIONAL SCHEMATIC 0 4 8 12 FORWARD CURRENT 50 MAX. ELECTRICAL POWER DISSIPATION FORWARD CURRENT 40 FIGURE 5 P el vs T mW 0 RELATIVE OPTICAL POWER 20 OPERATING TEMPERATURE 20 60 0 0 OPERATING TEMPERATURE mA FIGURE P o vs I3f % 120 RELATIVE OPTICAL POWER % 120 840nm 1008C 16 20 mA http://www.mitelsemi.com World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. 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