HFE4380-521 Datasheet, PDF (4/6 Pages) Finisar Corporation. – 1.25GBPS 850NM VCSEL SC TOSA PACKAGE

HFE438X-521
1.25GBPS 850NM VCSEL
NOTES
1. Reliability is a function of temperature, see
www.finisar.com/aoc.php for details.
2. For the purpose of these tests, I_F is DC current.
3. Threshold current varies as (T_A – T_O)². It may either
increase or decrease with temperature, depending upon
relationship of T_A to T_O. The magnitude of the change is
proportional to the threshold at T_O.
4. Slope efficiency is defined as ∆P_O/∆I_F.
5) 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.
TYPICAL PERFORMANCE CURVES
Emitted Power vs. Current: Power varies approximately
linearly with current above threshold.
Pmax
η
Typical operating current / power
I th
Current
Threshold Current vs. Temperature: Threshold current varies
parabolically with temperature; thus it can be nearly constant
for a limited temperature range.
I_TH I_MIN [1.1×10^-4 (T-T_MIN)²+1]
T_MIN , I_MIN
Temperature