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DATA SHEET
1.25GBPS 850NM VCSEL TO-46 PACKAGE
HFE408X-321
FEATURES:
Designed for drive currents between 5 and 15 mA Optimized for low dependence of electrical properties over temperature High speed 1 GHz Two different laser/ photodiode polarities Attenuating coating Packaged with a photodetector
The HFE408x-321 is a high-performance 850 nm VCSEL (Vertical Cavity SurfaceEmitting Laser) packaged for high-speed data communications. This product combines all the performance advantages of the VCSEL with a custom designed power monitor diode. The power monitor diode can be used with appropriate feedback control circuitry to set a maximum power level for each VCSEL. In addition, built-in power attenuation reduces the effective slope efficiency. These combined features simplify design for high data rate communication and eye safety. The HFE408x-321 is a high radiance VCSEL designed to convert electrical current into optical power that can be used in fiber optic communications and other applications. As the current varies above threshold, the light intensity increases proportionally. The HFE408x-321 is designed to be used with inexpensive silicon or gallium arsenide detectors (see HFD3081-103, HFD3081-108), but excellent performance can also be achieved with some indium gallium arsenide detectors. The low drive current requirement makes direct drive from PECL (Positive Emitter Coupled Logic) or EML (Emitter Coupled Logic) gates possible and eases driver design. The HFE408x-321 is designed to interface with 50/125 and 62.5/125 m multimode fiber. They product circularly symmetric, non-astigmatic, narrow divergence beams that, with appropriate lensing, fiber couple all of the emitter power.
Part Number
HFE4081-321 HFE4082-321
Description
Attenuated VCSEL with Back Monitor Photodiode - VCSEL Anode Common Attenuated VCSEL with Back Monitor Photodiode - VCSEL Cathode Common
HFE408X-321
1.25GBPS 850NM VCSEL TO-46 PACKAGE
ABSOLUTE MAXIMUM RATINGS
Parameter
INVISIBLE LASER RADIATION AVOID EXPOSURE TO BEAM CLASS 3B LASER PRODUCT 30mW at 820-860 nm PER IEC/EN 60825-1/A2.2001 AND 21 CFR 1040.10 AND 1040.11 EXCEPT FOR DEVIATIONS PURSUANT TO LASER NOTICE NO.50 DATED 26 JULY 2001
Rating
-40oC to +100oC 0oC to +70oC 260oC, 10 seconds 15mA 20mA 5V
Storage temperature Operating temperature Lead solder temperature
SEMICONDUCTOR LASER
Laser continuous average current Laser peak forward current with pulse width less than 1s Laser reverse voltage
AVOID EXPOSURE: Invisible LASER radiation is emitted from this aperture. Advanced Optical Components 600 Millenium Drive, Allen, TX 75013
PN55449
LASER RADIATION AVOID EXPOSURE TO BEAM CLASS 3B LASER PRODUCT
NOTICE: Stresses greater than those listed under "Absolute
Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operations section for extended periods of time may affect reliability.
HFE408X-321
ELECTRICAL-OPTICAL CHARACTERISTICS
VCSEL Parameters Peak Operating Current Optical Power Output Threshold Current Threshold Current Temperature Variation Slope Efficiency Slope Efficiency Temperature variation Peak Wavelength P Temperature Variation Spectral Bandwidth, RMS Laser Forward Voltage Laser Reverse Voltage Rise and Fall Times Relative Intensity Noise Series Resistance Beam Divergence Photodiode Parameters Monitor Current Monitor current Temperature Variation Dark Current PD Reverse Voltage PD Capacitance T A = 0 o C to 70 o C Po =0.5mW T A = 0 o C to 70 o C I F =12mA I F =12mA I F =12mA I F =12 mA I R =10 A Prebias Above Threshold, 20% -80% 1 GHz BW, I I F =12 mA I F =12 mA Test Condition Po =0.5mW Po =0.5mW Po =0mW, V R=3V Po =0mW, I R=10 A V R =0V, Freq=1MHz V R =3V, Freq=1MHz F=12mA Test Condition Adjustable to establish operating power I F =12mA Symbol I peak Po I TH I TH / T P P/ T VF BVR LD tr tf RIN RS Symbol I PD I PD / T ID BVR PD C 30 115 75 40 100 55 18 5 Min. 0.07 5 0.2 20 1.6 5 1.8 10 150 200 -128 25 15 Typ. 300 300 -122 40 20 Max. 0.250 830 0.3 1.5 -1.5 0.04 0.1 -0.5 850 0.06 0.85 2.2 860 Min. Typ. 12 0.6 3.5 Max. 20 1.2 6 1.5 0.16 Units mA mW mA mA mW/mA %/ oC nm nm/ o C nm V V ps dB/Hz Ohms Degrees Units mA %/ o C nA V pF 8 7 Notes 6 4 5 Notes 2 2,3
ELECTRO-OPTICAL CHARACTERISTICS (TA=25 oC unless otherwise stated)
HFE408X-321
1.25GBPS 850NM VCSEL TO-46 PACKAGE
NOTES
1. Reliability is a function of temperature, see www.finisar.com/aoc.php for details. Operating power is set by the peak operating current IPEAK=IBIAS+IMODULATION. For the purpose of these tests, IF is DC current. Threshold current varies as (TA - TO)2. It may either increase or decrease with temperature, depending upon relationship of TA to TO. The magnitude of the change is proportional to the threshold at TO. Slope efficiency is defined as PO/IF. 8. 6. Rise and fall times specifications are the 20% - 80%. Most of the devices will measure <200ps fall time. Rise and fall times are sensitive to drive electronics. Beam divergence is defined as the total included angle between the 1/e2 intensity points. To safeguard the VCSEL from current spike damage, short the VCSEL anode and cathode to each other during photodiode BVR verification testing. Additionally to safeguard the PIN photodiode, limit the photodiode reverse voltage in accordance with the absolute maximum rating.
2.
7.
3. 4.
5.
TYPICAL PERFORMANCE CURVES
Emitted Power vs. Current: Power varies approximately linearly with current above threshold. Threshold Current vs. Temperature: Threshold current varies parabolically with temperature; thus it can be nearly constant for a limited temperature range.
Emitted Power
Threshold Current
Pmax
I TH
IMIN [1.1x10 (T-TMIN ) +1]
-4
2
Typical operating current / power I th Current
TMIN , I MIN
Temperature
HFE408X-321
MOUNTING DIMENSIONS
DIMENSION A = 0.0780.004 MOUNTING DIMENSIONS (for reference only): All dimensions are in inches.
PINOUT
HFE4082-321
Number 1 2 3 Function KLD KPD, ALD APD Number 1 2 3
HFE4081-321
Function ALD KLD, APD KPD
PINOUT DEFINITIONS
ALD KLD VCSEL Anode VCSEL Cathode APD KPD Monitor Photodiode Anode Monitor Photodiode Cathode
HFE408X-321
1.25GBPS 850NM VCSEL TO-46 PACKAGE
ADVANCED OPTICAL COMPONENTS
Finisar's ADVANCED OPTICAL COMPONENTS division was formed through strategic acquisition of key optical component suppliers. The company has led the industry in high volume Vertical Cavity Surface Emitting Laser (VCSEL) and associated detector technology since 1996. VCSELs have become the primary laser source for optical data communication, and are rapidly expanding into a wide variety of sensor applications. VCSELs' superior reliability, low drive current, high coupled power, narrow and circularly symmetric beam and versatile packaging options (including arrays) are enabling solutions not possible with other optical technologies. ADVANCED OPTICAL COMPONENTS is also a key supplier of Fabrey-Perot (FP) and Distributed Feedback (DFB) Lasers, and Optical Isolators (OI) for use in single mode fiber data and telecommunications networks
AOC CAPABILITIES
ADVANCED OPTICAL COMPONENTS' advanced capabilities include: 1, 2, 4, 8, and 10Gbps serial VCSEL solutions 1, 2, 4, 8, and 10Gbps serial SW DETECTOR solutions VCSEL and detector arrays 1, 2, 4, 8, and 10Gbps FP and DFB solutions at 1310 and 1550nm 1, 2, 4, 8, and 10Gbps serial LW DETECTOR solutions Optical Isolators from 1260 to 1600nm range Laser packaging in TO46, TO56, and Optical subassemblies with SC, LC, and MU interfaces for communication networks VCSELs operating at 670nm, 780nm, 980nm, and 1310nm in development Sensor packages include surface mount, various plastics, chip on board, chipscale packages, etc. Custom packaging options
LOCATION
Allen, TX - Business unit headquarters, VCSEL wafer growth, wafer fabrication and TO package assembly. Fremont, CA - Wafer growth and fabrication of 1310 to 1550nm FP and DFB lasers. Shanghai, PRC - Optical passives assembly, including optical isolators and splitters.
SALES AND SERVICE
Finisar's ADVANCED OPTICAL COMPONENTS division serves its customers through a worldwide network of sales offices and distributors. For application assistance, current specifications, pricing or name of the nearest Authorized Distributor, contact a nearby sales office or call the number listed below.
Phone:1-866-MY-VCSEL USA (toll free) 1-214-509-2700 USA (Direct dial) 44 (0) 174 336 5533 Europe 886-935-409898 China & Taiwan 81-90-4437-1130 Japan 82-11-220-6153 Asia Pacific & Korea
Fax: 1-214-509-3709 USA
Email: support@adopco.com WEB: www.finisar.com/aoc.php
(c)2007 Finisar Corporation. All rights reserved. Finisar is a registered trademark of Finisar Corporation. Features and specifications are subject to change without notice.
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