Finisar HFE4191-441 Fiche technique télécharger pdf (Page 4)

HFE419X-441 2.5GBPS 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

is DC current.

3. Threshold current varies as (T

– T

)

. It may either

increase or decrease with temperature, depending upon

relationship of T

to T

. The magnitude of the change is

proportional to the threshold at T

4. Slope efficiency is defined as ∆P

/∆I

5. To compute the value of Slope Efficiency at a temperature

T, use the following equation:

η(T) ≈η(25

C)*[1+(∆η/∆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:

(T) ≈ R

(25

C)*[1+∆R

/∆T)*(T-25)]

8. Monitor current tracking is defined as follows:

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.

Current

Emitted Power

Pmax

Typical operating current / power

Threshold Current

Temperature

MIN

, I

MIN

[1.1×10

-4

(T-T

MIN

)

+1]

0.45mW / 0.45mW) (PI

0.75mW / 0.75mW) (PI

Deltrk

OPD

1 2 3 4 5 6

Commentaires sur ces manuels

Pas de commentaire

Finisar HFE4191-441 Fiche technique Page 4

Commentaires sur ces manuels