F i n i s a r
Confidential an d Proprietary © 2012 Finisar Corporation. All rights reserved Rev. A1 Page 1
Product Specification
2.5Gbps 850nm VCSEL, LC TOSA
HFE4190-441, HFE4191-441
PRODUCT FEATURES
• 850nm multi-mode oxide isolated VCSEL
• Extended Temperature Range Operation (– 40 to +85 deg
operating range)
• Capable of modulation operation from DC to 2.5Gbps
• TO-46 tilt window metal can component, prealigned into
LC Sleeve
• Designed for drive currents between 3-15mA average
• Packaged with a back monitor
• Attenuated window can
These products are high-performance 850nm VCSELs (Vertical Cavity Surface-Emitting Lasers)
designed for high-speed data communications and packaged 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 the VCSEL. These combined features simplify design for high
data rate communication and eye safety.
These products are designed to be used with inexpensive silicon or gallium arsenide detectors,
but excellent performance can also be achieved with some indium gallium arsenide detectors
(see HFD3180-103 and HFD3180-108 product data sheets).
VCSELs produce circularly symmetric, non-astigmatic, narrow divergence beams that, with
appropriate lensing, fiber couple all of the emitter power. These LC TOSA products are pre-
aligned and focused fiber optic transmitters designed to interface with 50/125 and 62.5/125m
multi-mode fiber
PRODUCT SELECTION
Part Number Description
HFE4190-441 LC TOSA with attenuated TO-46 component, VCSEL with Back Monitor
Photodiode, Anode of VCSEL common with Photodiode Cathode
HFE4191-441 LC TOSA with attenuated TO-46 component, VCSEL with Back Monitor
Photodiode, Cathode of VCSEL common with Photodiode Anode
HFE419x-441 Product Specification – Apr 2013 F i n i s a r
Confidential an d Proprietary © 2012 Finisar Corporation. All rights reserved Rev. A1 Page 2
I. Absolute Maximum Ratings
Parameter Rating
Storage Temperature -40 to +85°C
Case Operating Temperature -40* to +85°C
Lead Solder Temperature 260°C, 10 sec.
Laser continuous average current 12mA
Laser peak forward current with pulse width less than 1us 18mA
Laser reverse voltage 5V
ESD Exposure (Human Body Model) 225V
1
1Heel and wrist straps must be used on a properly grounded workstation
Notice
Stresses greater than those listed under “Absol ute Maximum Ratings”
may cause permanent damage to the device. This i s 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.
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
HFE419x-441 Product Specification – Apr 2013 F i n i s a r
Confidential an d Proprietary © 2012 Finisar Corporation. All rights reserved Rev. A1 Page 3
II. Electro-Optical Characteristics
VCSEL Parameters Test Condition Symbol Min. Typ. Max. Units Notes
Average Fiber Coupled Power IF = 7mA POC 0.500 mW 2
Minimum coupling efficiency
including wiggle IF = 7mA 55 % 2
Threshold Current ITH 0.5 1.8 2.5 mA
Th res hol d Curre nt maximum
deviation fr om 25oC value TA = 0oC to 70oC ΔITH -0.5 1 mA 3
T
A = 25oC to 85oC ΔITH 1.7 mA 3
T
A = -40oC to 25oC ΔITH 2.5 mA 3
Temperature at minimum
threshold current T
O -20 50 oC 3
Slope Efficiency TA = 25oC η 0.04 0.125 0.16 mW/mA 4
T
A = -40oC η 0.200 mW/mA
T
A = 85oC η 0.03 mW/mA
Slope Efficiency Temperature
variation TA = 0oC to 70oC Δη/ΔT -6000 ppm/ oC 5
Peak Wavelength IF = 7mA,
TA = 0oC to 85oC λP 830 850 860 nm
λP Temperature Variation IF = 7mA,
TA = -40oC to 85oC ΔλP/ΔT 0.06 nm/oC
Spectral Bandwidth, RMS IF = 7mA Δλ 0.65 nm
Laser Forward Voltage IF = 7mA VF 1.8 2.0 V
Rise and Fall Times Pavg = 0.625mW,
Extinction Ratio = 10 tr
tf
130
150 ps 6
Relative Intensity Noise 1 GHz BW, IF = 7mA RIN -130 -122 dB/Hz
Series Resistance IF = 7mA , TA = 25oC RS 25 35 50 Ω
T
A = -40oC RS 60 Ω
T
A = 85oC RS 20 Ω
Series Resistance Temperature
Coefficient IF = 7mA,
TA = 0oC to 70oC ΔRs/ΔT -3000 ppm/ oC 7
Photodiode Parameters Test Condition Symbol Min. Typ. Max. Units Notes
Monitor Current Poc = 0.5mW, TA =
25oC IPD 0.1 0.6 mA
Poc = 0.5mW, TA = -
40oC IPD TBD TBD
Poc = 0.5mW, TA =
+85oC IPD TBD TBD mA
Monitor current Temperature
Variation Poc = 0.5mW, 0oC to
70oC ΔIPD/ΔT TBD %/ oC
Monitor Current Tracking Deltrk TBD 8
Dark Cu rrent Po = 0mW, VR = 3V ID 20 nA
PD Capacitance VR = 0V, Freq = 1MHz
VR = 3V, Freq = 1MHz C 75
40 100
55 pF
HFE419x-441 Product Specification – Apr 2013 F i n i s a r
Confidential an d Proprietary © 2012 Finisar Corporation. All rights reserved Rev. A1 Page 4
Notes:
1. Reliability is a function of temperature, see www.finisar.com for details.
2. For the purpose of these tests, IF is D C current.
3. Threshold current varies as (TA – TO)2. It may either increase or decrease with tem perature,
depending up o n rel a t i onship of TA to TO. The magnitude of the change is proportional to the
threshold at TO.
4. Slope efficiency is defined as ΔPO/ΔIF.
5. To compute the value of Slope Efficiency at a temperature T, use the following equation:
η(T) ≈ η(25oC)*[1+(Δη/Δ T)*(T-25)]
6. Rise and fall times specifications are the 20% - 80%. Most of the devices will measure <135ps fall
time. Rise and fall times are sensitive to drive electronics.
7. To compute the value of Series Resistance at a temperature T, use the following equation:
RS(T) ≈ RS(25oC)*[1+(ΔRS/ ΔT)*(T-25)]
8. Monitor current tracking is defined as follows:
III. 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.
Temperature
Threshold Current
TMIN, IMIN
ITH ≈ IMIN[1.1×10-4(T-TMIN)2+1]
Cu
rr
e
n
t
Pmax
Typical operating current / power
Ith
η
0.45mW / 0.45mW) (PI
0.75mW / 0.75mW) (PI
Deltrk OPD
OPD
=
=
=
HFE419x-441 Product Specification – Apr 2013 F i n i s a r
Confidential an d Proprietary © 2012 Finisar Corporation. All rights reserved Rev. A1 Page 5
IV. Environmental Specifications
Parameter Symbol Min Typ Max Units Ref.
Case Operating Temperature Top -40 85 °C
Sto rage Temperatu re Tsto -40 85 °C
V. Regulatory Compliance
Feature Agency Standard Certificate
Number
Laser Eye
Safety FDA/CDRH CDRH 21 CFR 1040 and Laser Notice 50
Copies of the referenced certificates are available at Finisar Corporation upon request.
HFE419x-441 Product Specification – Apr 2013 F i n i s a r
Confidential an d Proprietary © 2012 Finisar Corporation. All rights reserved Rev. A1 Page 6
VI. Mechanical Specifications
HFE4190-441 HFE4191-441
Number Function Number Function
1 KLD 1 ALD
2 KPD, ALD 2 KLD, APD
3 APD 3 KPD
ALD VCSEL Anode APD Monitor Photodiode Anode
KLD VCSEL Cathode KPD Monitor Photodiode Cathode
(dimensions are in inches [mm])
HFE419x-441 Product Specification – Apr 2013 F i n i s a r
Confidential an d Proprietary © 2012 Finisar Corporation. All rights reserved Rev. A1 Page 7
XI. Revision History
Revision Date Description
A1 4/13/2013
• Document created.
XII. For More Information
Finisar Corporation
1389 Moffett Park Drive
Sunnyvale, CA 94089-1133
Tel. 1-408-548-1000
Fax 1-408-541-6138
sales@finisar.com
www.finisar.com
