EML10WCA Bookham Technology, EML10WCA Datasheet - Page 7

• Manufacturer Part Number: EML10WCA
• Description: 10gb/s DWDM EA Modulator and DFB Laser with GPO RF Connector
• Manufacturer: Bookham Technology

7
Reliability
Bookham has a corporate policy for continuous improvement, to provide optical components with superior quality in terms of
opto-electronic performance and operational life and reliability. The Bookham EML10 and EML11 Integrated Electro-absorption
laser products use a ridge waveguide structure for the laser and modulator, which provides superior reliability compared to buried
heterostructures. It has been subjected to a stringent reliability assurance program, the conclusions of which confirm product
reliability exceed the generic requirements of Telcordia GR-468 CORE.
More than 965,000 device-hours of data under accelerated life test conditions have been analysed, which for the purpose of
characterising random failure rate, is equivalent to 28,300,000 device hours at 25ºC operating temperature [7] . Electro-optic
parameters for a 15 year service life at operating temperature of 25ºC have been estimated. The estimated delta over life for
specific device parameters is shown in the table below.
The reliability failure rate statistics are summarized in the table below. The results are reported for the operation of the device
against a laser bias of 100 mA drive current. The resultant low MTTF [8] , essentially demonstrating minimal component wear out
over the rated 15-year lifetime of the component [7] .
Data Sheet
Parameter
EA - Extinction rate ER
Laser threshold current
Laser efficiency
Laser current for constant output power
Laser power at constant current (100 mA)
Parameter
Median life (ML) at 25°C
σ (standard deviation of the natural logarithms of the TTFs)
µ (mean of the natural logarithms of the TTFs)
Maximum wear-out failure rate
Average wear-out failure rate over 15 years life
Wear-out thermal activation energy
Random failure rate at 25°C at 60% confidence
Random failure rate activation energy
Notes:
[7] Refer to QR1524, qualification report for the Bookham 10Gb/s Electro-Absorption Modulated Laser.
[8] The Bookham policy is to derive random failure rates from actual field data.
Maximum allowed change
0.5 dB
10 %
10 %
10 %
10 %
Value
528
0.64
6.27
0
0
0.5
33
0.35
(1)
Change over 15 years @ 25 °C
Mean (std. deviation)
0.01 % (0.3 %)
-0.2 % (0.4 %)
0.2 % (0.4 %)
-0.2 % (0.4 %)
-0.03 dB (0.2 dB)
Units
Years
FITs
FITs
eV
FITs
eV