1653nm Laser Diode

This model is EDFB16538-MG1. It is specially made for methane detection. The wavelength is 1653.7nm. It is a DFB laser. It has a built in TEC (thermoelectric cooler) and a thermistor. When you use the product for gas sensing, you get very high accuracy. A coal mine safety customer used our laser. Before, they used an LED for methane detection. The accuracy was not enough. False alarms happened often. After switching to our DFB laser, the detection limit went down from 1000ppm to 10ppm. Why? The DFB wavelength is very pure. Side mode suppression ratio is 35dB. Spectral width is only 0.8nm. That means it absorbs exactly the methane peak. The product gives you lab grade performance in the field.

We have a post doctoral core R&D team. There are 12 people. They focus on optical modules and laser packaging. Our factory has eutectic machines, die bonders, wire bonders, and cap sealers. All are imported equipment. We have a joint R&D center with Hangzhou Dianzi University. Our products meet Telcordia GR-468 reliability standards. That standard is very strict. We use 5S management. Each laser is fully tested. We give 1 year warranty for standard products. Custom products have 6 months warranty. If goods are damaged, send photos within 48 hours. We will send free replacements. The product is built for harsh environments.

Wavelength: center is 1653.7nm. This is the methane absorption peak. When you do detection, the wavelength must be aligned. Our wavelength error is within ±1nm. Wavelength changes with temperature by 0.1nm/°C. It changes with current by 0.015nm/mA. So you need to use the TEC for temperature control. TEC: The built in TEC can cool down by 88 degrees. Power consumption is 0.94W. Current is 0.63A. Voltage is 2.64V. You need to supply power to the TEC. Thermistor R25 is 10KΩ. B value is 3930. That lets you control the laser temperature precisely. Side mode suppression ratio: 35dB. It means the light is very pure with no other wavelengths. Threshold current: 15 to 18mA. Operating current: 40mA. Optical power at that current is 2 to 5mW. You do not need to drive it hard. Package: TO-60 hermetic aspheric lens package. The lens has already focused the light. You do not need extra lenses. The 1653nm Laser Diode is ready to use.

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