We all know that most of the laser diodes on the market are eel, and the market share is about 85%, but most of these 85% lasers are TO-packaged, such as TO56,TO33,TO9 and so on. Today, Xiaobian brings you a different laser packaged by laser patch, which is also the laser emitted by EEL. Many other people ask what role it has, and Xiaobian will answer it for you.

EEL patch laser diode has the advantages of small volume, compact package, low heat generation and high efficiency. The most important thing is good beam quality and high power. To put it bluntly, it can make light bright and stable, and it can be easily integrated into various devices, which makes its application range particularly wide.

In the industrial field, EEL laser diode is almost "standard". For example, our common laser rangefinder, displacement sensor, contour detector, many of which use EEL structure. Because its luminous direction is concentrated, the light spot is clean, and it can form very fine light after being equipped with a lens, and the ranging accuracy can reach millimeter level or even higher.

Another example is laser communication. Nowadays, high-speed transmission is emphasized. Many traditional optical fiber systems use EEL laser as light source, and the light energy emitted by it is directly coupled into the optical fiber, with small signal attenuation, long transmission distance and high stability. This is why data centers, base station communication equipment and 5G optical modules are all using EEL laser chips.

I know an engineer who makes intelligent detection equipment. Two years ago, their company upgraded from ordinary LED light source to EEL laser module, and the detection accuracy was improved several times. In the past, small flaws, such as tiny cracks on the glass surface and bubbles in plastic parts, were almost invisible to the naked eye. After being polished by EEL laser, the contrast of images captured by the camera was obviously enhanced, and the error was directly reduced by an order of magnitude.

Although the EEL patch laser diode is small, it is almost the "basic brick" in the modern photoelectric field. It is silently embedded in the machine, but it plays a key role in illumination, measurement, transmission and treatment. It is not the most dazzling beam of light, but it is the "core light" that supports the stable operation of the whole laser world.