Application Notes
Test and Characterization of Laser Diodes
It is often necessary to quantitatively assess the quality, performance, and characteristics of laser diodes. This is done through performing a series of experiments and obtaining certain ...
Application Notes
Measuring Wide Linewidth Source with OMH-6700
The OMH-6700B series of optical measurement heads measure wavelength to within ±0.5 nm accuracy for the 6730B series and to within ±1 nm for the 6720B series for narrow linewidth sources. ...
Application Notes
Using a Power Wavehead for Emitter Level Screening of High Power Laser Diode Bars
Emitter level screening has been shown to be an effective tool for testing high power laser diode bars and stacks. Measurement of individual emitter output power, wavelength, and polarization ...
Application Notes
Calibration and Traceability of ILX Lightwave Optical Power Meters
Traceability refers to an unbroken chain of calibration transfers from a known standard to the instrument in question. At ILX Lightwave, this chain of traceability begins with the primary ...
Application Notes
Controlling Temperatures of Laser Diodes Thermoelectrically
In many applications, active temperature control improves the performance of optoelectronic devices. In most solid-state detectors, noise decreases with operating temperature. Responsivity ...
Application Notes
Selecting and Using Thermistors for Temperature Control
Thermally sensitive resistors (thermistors) are used widely in laser diode and detector cooling applications because of their high sensitivity, small size, ruggedness, fast response ...
Application Notes
Protecting Your Laser Diode
It’s been said that there are two types of researchers - those who have blown a laser diode and those who will. While that may be an exaggeration, it’s certainly true that today’s lab ...
Application Notes
Laser Diode Characteristics Overview
Diode lasers have been called “wonderful little devices.” They are small and effi cient. They can be directly modulated and tuned. These devices affect us daily with better clarity ...
Application Notes
Thermistor Calibration and Steinhart-Hart
Thermistors provide an inexpensive and accurate temperature monitor for use with laser diodes. The nonlinear resistancetemperature characteristics of a Negative- Temperature Coeffi ...
Application Notes
Choosing the Right Laser Diode Mount for Your Application
The multitude of laser diode packages available today make selecting the correct mount for laboratory, development, or production testing seem a daunting task. This Application Note ...
Application Notes
Mode Hopping in Semiconductor Laser Diodes
In this Application Note, we show that mode hopping is directly correlated to noise in the total intensity, and that this noise is easily detected by a photodiode. We also show that ...
Application Notes
Pulsing a Laser Diode
Relatively high peak powers and effi cient operation have made pulsed laser diodes ideal for applications such as solid-state laser pumping and range fi nding. These higher peak powers ...
Application Notes
Optimizing TE Drive Current
This Application Note discusses methods for optimizing the TEC drive current for optimum operation in heating and cooling applications. Thermoelectric coolers (TECs) are widely used ...
Application Notes
Differences Between Threshold Current Calculations
This application note explains the four Telcorida recognized threshold calculation methods, and why each method will result in a slightly different threshold value.
Application Notes
Testing Bond Quality
There are several methods of testing the quality of the bond, ranging from the destructive, such as a sheer test where the chip is physically broken off its sub-mount, to non-destructive, ...
Application Notes
AD590 and LM335 Sensor Calibration
The AD590 is a linear thermal sensor which acts as a constant current source. It produces a current, I, which is directly proportional to absolute temperature, over its useful range ...
Application Notes
Basic Test Methods for Passive Fiber Components
The ever increasing demand for telecommunications bandwidth is driving the market for the components that make up fi ber-optic networks. This article presents basic principles of passive ...
Application Notes
PID Control Loops
There are many companies that manufacture temperature controllers with various levels of complexity. These instruments use different algorithms and control loops to maintain set temperature. ...
Application Notes
High Performance Temperature Control in Laser Diode Test Applications
A typical application in laser diode test is the characterization of laser output over wide temperature ranges, typically from 0°C to 85°C. Quick changes to and rapid stabilization ...
Application Notes
Modulating Laser Diodes
The external modulation feature found on many ILX Lightwave current sources is a very fl exible circuit that can be used for a wide variety of applications. If the task is to slightly ...
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