What Is A Laser Diode Life Test?
Life-tests consist of the highly accelerated ageing, under controlled conditions, of a group of lasers taken as a representative sample. Optical degradation of the laser diodes is observed and recorded by precisely measuring changes in the laser's operating characteristics during the test. Life-tests are used for vendor qualification of the laser diodes during product development and can be conducted throughout the production life of the laser.
The data collected from these life tests are used to predict laser life expectancy under the intended operating characteristics. There are many device parameters that can be monitored to provide life-test analysis, such as optical output power, threshold current and operating current. The accelerated ageing of the device is achieved through applying high temperature to the device under test.
What Are The Benefits Of Life Testing
The Main Benefits of Life Testings are:
WAFER VERIFICATION -
One of the major benefits and uses of life-testing is in wafer verification. If a new wafer design has been created, it is vital for your company to establish how reliable the wafer will be. In order to do this, a sample size is chosen and life-tested.
RATE OF RANDOM WEAR OUT FAILURES -
Life-testing can provide information on the rate of random wear out failures that will occur during the lifetime of a laser diode or laser device. While burn-in testing detects early infant mortalities (lasers that fail early in their lifetimes), life-testing will determine the level of random failures during the predicted operating lifetime of the device. It will also enable the company to determine the length of operating life that the devices will have before they begin to fail due to usage wear out.
Our Life Test Systems
Yelo have two life test systems
Y1000L -
Designed for Low Power Laser Diodes up to 1A
Y2000H -
Designed to Life Test High Powered Laser Diodes up to 300A