DFB

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How to choose a tunable laser?

Tunable lasers offer great flexibility to researchers and also industrials. They are used in many different applications areas: atmospheric sensing, biomedicine, microscopy, spectroscopy, atom cooling, defense, medicine, and more. We cannot help but notice that there is more than one type of tunable laser available on the market. What are the differences between those lasers? How to make a choice between them? Here is a quick summary of the tunable lasers available today and their range of performances. Something missing? Some…

Practical case- Tunable DFB laser diode - header

Tuning a DFB laser diode with temperature

Distributed Feedback (DFB) lasers are commonly used as tunable lasers over a range of a few nanometers. This is generally achieved by adjusting the temperature of the chip, thanks to a driver that can also monitor the current flowing through the DFB. This is a straightforward way of obtaining a tunable laser for a narrow range, typically one or two nanometers. However, temperature tuning can lead to unexpected behaviors which can be critical in many applications. A distributed feedback (DFB)…