Fiber Optic LAN Components HFE4
08
x-
3
21
High Speed VCSEL 1.25Gbps
Honeywell
www.honeywell.com/sensing/VCSEL
FEATURES
• Designed for drive currents
between 5 and 15 mA
• Optimized for low dependence
of electrical properties over
temperature
• High spe ed ≥1 GHz
• Two different laser/
photodiode po larities
• Attenuating coating
• Packaged with a photodetector
LASER RADIATION
AVOID EXPOSURE TO BEAM
CLASS 3B LASER PRODUCT
The HFE408x-321 is a high-performance 850 nm VCSEL (Vertical Cavity
Surface-Emitting 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, 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 µm
multimode fiber. They product circularly symmetric, non-astigmatic, narrow
divergence beams that, with appropriate lensing, fiber couple all of the emitter
power.
Fiber Optic LAN Components HFE408x-321
High Speed VCSEL 1.25Gbps
2 Honeywell •For application help: call 1-800-537-6945
www.honeywell.com/sensing/VCSEL
ABSOLUTE MAXIMUM RATINGS
Parameter Rating
Stor age Temperatu r e -40 to +125°C
Operatin g Temperatu r e 0 to +70°C
Lead Solder Temperature 260°C, 10 sec.
Continuous Optical Output Power (Any Current) 5 mW
Laser Diode Reverse Voltage (IR=10 µA) 5 V
Laser Continuous Forward Current, Heat-Sinked 15 mA
PIN Photodiode Forward Current 10 mA
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.
ELECTRO-OPTICAL CHARACTERISTICS (TA=25 oC unless otherwise stated)
VCSEL Parameters Test Conditio n Symbol Min. Typ. Max. Units Notes
Peak Operating Current Adjustable to establish
operating power Ipeak 12 20 mA 1
Optical Power Output IF=12mA Po 0.3 0.6 1.2 mW 1
Threshold Current ITH 1.5 3.5 6 mA
Threshold Current
Temperature Variation TA = 0oC to 70oC∆ ITH -1.5 1.5 mA 2
Slope Efficiency Po =0.5mW η0.04 0.1 0.16 mW/mA 3
Slope Efficiency
Temperature variation TA = 0oC to 70oC∆η /∆T-0.5 %/ oC
Peak Wavelength IF=12mA λP830 850 860 nm
λP Temperature Variation IF=12mA ∆λP/∆T0.06 nm/oC
Spect ral B andwidth, RM S IF=12mA ∆λ 0.85 nm
Laser Forward Voltage IF=12 mA VF1.6 1.8 2.2 V
Laser Reverse Voltage IR=10 µABVRLD 510 V
Rise and Fall Times Prebias Above
Threshold, 20%-80% tr
tf
150
200 300
300 ps 4
Relative Intensity Noise 1 GHz BW, IF=12mA RIN -128 -122 dB/Hz
Series Resistance IF=12 mA RS18 25 40 Ohms
Beam Divergence IF=12 mA θ5 15 20 Degrees 5
Photodio de Parameters Test Condition Symbol Min. Typ. Max. Unit s No tes
Monitor Current Po =0.5mW IPD 0.075 0.250 mA
Monitor current
Temperature Variation Po =0.5mW ∆IPD/∆T0.2 %/ oC
Dark Current Po =0mW, VR=3V ID20 nA
PD Reverse Volta ge Po =0mW, IR=10 µABVRPD 30 115 V 6
PD Capacitance VR=0V, Freq=1MHz
VR=3V, Freq=1MHz C75
40 100
55 pF
Fiber Optic Components HFE408x-321
High Speed VCSEL 1.25Gbps
For application help: call 1-800-537-6945 Honeywell • 3
www.honeywell.com/sensingVCSEL
Notes:
1. Operating power is set by the peak operating
current IPEAK=IBIAS+IMODULATION.
2. Operation at temperatures outside the specified
range may result in the threshold current
exceeding the maximums defined in the electro-
optical characteristics table.
3. Slope efficiency is defined as ∆Po/∆IF at a total power
output of 0.5 mW. Slope efficiency is intentionally
lowered to the values shown by optical attenuation.
4. Rise and fall times are sensitive to drive electronics,
200ps rise and fall times are achievable with Honeywell
VCSELs.
5. Beam divergence is defined as the total included angle
between the 1/e2 intensity points.
6. To safeguard the VCSEL from curre nt spike damage,
short the VCSEL anode and cathode to each other
during photodiode BVR verification testing.
Additionally to safeguard the PIN photod iode, limit the
photodiode reverse voltage in accordance with the
abso lute maxi mum rati ng.
TYPICAL PERFORMANCE CURVES
Emitted Power vs. Current: Power varies
approximately linearly with current above threshold.
Current
Emitted Pow er
ITH
Typica l IOP, POP
Threshold Current vs. Temperature: Threshold
current varies parabolically with temperature; thus it can
be nearly constant for a limited temperature range.
Temperature
Threshold Current
TMIN, IMIN
ITH ≈
≈≈
≈=
==
=IMIN[1.1×10-4(T-TMIN)2+1]
Emission Intensity vs. Wavelength: Typical
10 mA spectrum comprises multiple lines corresponding to
multiple transverse modes.
Wavelength
Emission Intensity
FW HM of e nve lope
typica lly < 0.5 nm
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 precaution s when handling this p r oduct.
DANGER
The VCSEL is a class IIIb laser and should be treated as a
potential eye hazard. Due to the size of the component, the
applicable warning logotype, aperture label, and certification/
identification label cannot be placed on th e component itself.
These labels can be found on the individual envelope in
which the VCS EL unit i s packaged, or attach ed to the
ship ping p ackage.
Fiber Optic LAN Components HFE408x-321
High Speed VCSEL 1.25Gbps VCSEL
02/19/02
Honeywell Inc.
11 West Spring Street
Freeport, Illinois 61032
Honeywell Inc.
Optoelectronics Facility
830 East Arapaho Road
Richardson, Texas 75081
Honeywell Control
Systems Ltd.
Zodiac House
Calleva Park
Aldermaston, Berkshire
RG7 8HW England
Helping You Control Your World
006694-1-EN IL50 GLO 797 Printed in USA
Printed with Soy Ink
on 50% Recycle d Paper
ORDER GUIDE
Catalog Listing Description
HFE4081-321 Attenuated VCSEL with Back Monitor Photodiode -
VCSEL Cathode Common
HFE4082-321 Attenuated VCSEL with Back Monitor Photodiode -
VCSEL Anode Common
MO UNTING DIMENSIONS (for reference only): in./(mm)
DIMENSION A = 0.078±0.004
PINOUT
HFE4082-321 HFE4081-321
Number Function Number Function
1K
LD 1A
LD
2K
PD, ALD 2K
LD, APD
3A
PD 3K
PD
PINOUT DEFINITIONS
ALD VCSEL Anode APD Monitor Photodiode Anode
KLD VCSEL Cathode KPD Monitor Photodiode Cathode
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of defective materials
and faulty workmanship. Commencing with the date of shipment, Honeywell’s
warranty runs for 18 months. If warranted goods are returned to Honeywell during
that period o f coverage, Honeywell will repair or replace without charge those items
it finds defective. The foregoing is Buyer’s sole remedy and is in lieu of all other
warranties, expressed or implied, including those of merchantability and fitness
for a particular pur pos e.
While we provide appl ication assistance,
personally and through our literature, it is up to
the customer to determine the suitability of the
product in the application.
Specifications may change at any time without
notice. The information we supply is believed to
be accurate and reliable as of this prin ting.
However, we assume no responsibility for its use.
SALES AND SERVICE
Honeywell Sensing and Control serves its
customers through a worldwide network of sales
offices and distributors. For application
assistance, current sp ecifications, pricing or name
of the nearest Authorized Distributor, contact a
nearby sales office or call:
TELEPHONE
1-800-367-6786 (USA)
1-800-737-3360 (Canada)
+49 (0) 89 35813310 (Germany)
+65-580-3312 (Singapore)
+44 (0) 118 981 9511 (UK)
FAX
1-972-470-4326 (Customer Response Center)
1-972-470-4549 (Fax on demand)
+49 (0) 89 3599971 (Germany)
+65 445 3033 (Singapore)
+44 (0) 118 981 7513 (UK)
INTERNET
http://www.honeywell.com/sensing/VCSEL
info.sc@honeywell.com
