Application Notes

Application Notes

Measuring Linewidth Source with OMH-6700 - AN16

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 - AN32

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 - AN36

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 - AN01

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 - AN02

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 - AN03

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 - AN05

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 - AN04

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 - AN06

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 - AN08

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 - AN11

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 - AN14

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 - AN12

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 - AN13

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 - AN17

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 - AN18

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 - AN20

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 - AN21

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 - AN22

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 …

Application Notes

Laser Diode Burn-In and Reliability Testing - AN23

Over 99% of all lasers manufactured in the world today are semiconductor laser diodes. Reliability is a concern in every laser diode application whether it is a simple $10 laser pointer …

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