HFE3637-001/XBA Honeywell

H Fibre Optic LAN Components HFE3637-001/XBA Low Cost VCSEL FEATURES High speed low cost VCSEL. Industry standard ST-LP fibre connector. Designed for drive currents between 5 and 15mA Optimised for low temperature dependence DESCRIPTION The HFE3637-001/XBA is a high-performance 850nm VCSEL (vertical cavity surface emitting laser) intended for medium to high speed data communications. It combines many of the desirable features of an LED with the desirable features of a laser diode, operating in a single longitudinal mode but with multiple transverse modes reducing coherence and consequent modal noise in multimode fibre applications. APPLICATION The HFE3637-001/XBA is a high radiance VCSEL packaged in a TO-46 header with a metal can assembled in a ST-LP connector. The component produces a circularly symmetric, narrow divergence beam. The stability of operating characteristics with temperature allows operation without continuous photo diode control, simplifying drive current considerably. The HFE3637-001/XBA is designed to be used with inexpensive silicon or gallium arsenide detectors, but excellent performance can also be achieved with some indium gallium arsenide detectors. The low drive current of the HFE3637-001/XBA makes direct drive from PECL or ECL logic gates feasible and eases driver design. Note : ST is a trademark of AT&T Honeywell Control Systems Rev : 00/1 Fibre Optic LAN Components HFE3637-001/XBA Low Cost VCSEL ABSOLUTE MAXIMUM RATINGS NOTICE Stresses greater than those listed under Storage temperature -40 to +100C Absolute Maximum Ratings may cause Operating temperature permanent damage to the device. This is a 0 to +70C stress rating only and functional operation of 15mA Forward current the device at these or any other conditions Reverse voltage 5V 10A above those indicated in the operations section for extended periods of time may affect reliability. ELECTRO-OPTICAL CHARACTERISTICS (Tests made at 25C unless otherwise stated) Parameter Symbol Min. Typ. Max. Units Test Conditions (1) Coupled power P 100 400 W I = 10mA OC F 50/125m fibre -10.0 -4.0 dBm Rise / Fall Time t /t 400 pS I = 10mA r f F Threshold Current I 1.5 3.5 7 mA I = 10mA TH F Threshold current I -1.9 1.9 mA I = 10mA. F TH temperature variation T = 0C to 70C A Slope Efficiency 0.3 mW/mA I = 10mA F Slope efficiency temperature -0.5 I = 10mA. /T %/C F variation. T = 0C to 70C A Peak Wavelength 820 850 850 nm I = 10mA DC F P Temperature variation /T 0.06 nm/C I = 10mA F P Spectral Bandwidth 0.85 nm I = 10mA DC F Laser forward voltage V 1.5 1.75 2.2 V I = 10mA F F Series Resistance r 15 25 40 DC S Beam divergence 10 Degrees 1. Tested into 50/125m graded index fibre, 0.2NA, 10mA I F NOTICE The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation to equipment, take normal ESD precautions when handling this product. Honeywell Control Systems Rev : 00/1