HFE4192-581 Finisar Corporation, HFE4192-581 Datasheet - Page 4

• Manufacturer Part Number: HFE4192-581
• Description: Laser Diode VCSELs-LD 860nm 4-Pin LC TOSA
• Manufacturer: Finisar Corporation
• Type: VCSELs-LDr

Specifications of HFE4192-581

• Package: 4LC TOSA
• Maximum Dark Current: 20 nA
• Photodiode Reverse Voltage: 5 V
• Wavelength: 860 nm

HFE4192-58X
NOTES
1.
2.
3.
4.
5.
6.
7
TYPICAL PERFORMANCE CURVES
Emitted Power vs. Current: Power varies approximately
linearly with current above threshold.
Reliability is a function of temperature, see
www.finisar.com/aoc.php for details.
For the purpose of these tests, I
Threshold current varies as (T
increase or decrease with temperature, depending upon
relationship of T
proportional to the threshold at T
Slope efficiency is defined as ∆P
To compute the value of Slope Efficiency at a temperature
T, use the following equation:
η(T) ≈ η(25 o C)*[1+(∆η/∆T)*(T-25)]
Rise and fall times specifications are the 20% - 80%. Most
of the devices will measure <80ps fall time.
To compute the value of Series Resistance at a
temperature T, use the following equation:
R
S
(T) ≈ R
I th
S
(25 o C)*[1+∆R
A
Typical operating current / power
to T
O
η
4.25GBPS 850NM VCSEL
. The magnitude of the change is
S
/∆T)*(T-25)]
Current
A
– T
F
O
is DC current.
/∆I
O
O
Pmax
.
)
2
F
. It may either
.
8.
9.
10. Relaxation Oscillation Frequency (ROF) is determined by
Threshold Current vs. Temperature: Threshold current
varies parabolically with temperature; thus it can be nearly
constant for a limited temperature range.
Deltrk
These specifications are for the TOSA component alone.
Reflections introduced by any subsequent higher level
assembly may affect these values.
Monitor current tracking is defined as follows:
the relationship:
Where r= I F /I TH , tc is the photon lifetime (2.5ps), and τ 2
is the spontaneous emission lifetime (1ns). Both t c and τ 2
are functions of temperature. When operating at high
temperature, the r (I F /I TH ) value can be significantly
reduced and still maintain adequate speed performance.
This is recommended in order to preserve reliability.
ROF
=
=
2π
1
I
I
PD
PD
⋅
(P
(P
O
O
c t
I
TH
=
=
r
−
⋅
0.75mW)
0.45mW)
2 τ
1
I
Temperature
MIN
−
2 t
T
r
[1.1×10
MIN
/
/
0.75mW
0.45mW
, I
MIN
-4
(T-T
MIN
)
2
+1]