About QSI Laser Diodes

This post provides an overview of QSI laser diodes, including the range of laser diodes available, as well as why you might choose a QSI laser diode. ProPhotonix works with a number of laser diode manufacturers. This post is part of a series of posts introducing our laser diode manufacturers.

About QSI

QSI was established in 2000 and has grown rapidly to become the leading laser diode manufacturer in South Korea. With its headquarters and wafer fab in Cheonan City, South Korea and a high volume packaging facility in Shanghai, QSI is well equipped for both high and low volume manufacturing.

QSI Laser Diodes Range

QSI offers a range of red and IR laser diodes with wavelengths from 635nm to 850nm. Output powers range from 5mW to 50mW for the red laser diodes and up to 450mW is available in IR. In addition to the standard 5.6mm TO can package, QSI offers a number of innovative can packages including D-cut and I-cut for use in confined spaces. The company also recently introduced 3.3mm TO can packaging capability, resulting in a number of new laser diodes having been launched, including 650nm laser diodes at 5mW and 10mW output power.


QSI is well established in a number of applications including laser printing, bar code scanning, power tools and optical pick-ups. As the company’s range has expanded, newer applications include medical equipment, automotive, defence, and 3D gesture recognition and display.

Why QSI Laser Diodes?

QSI has an excellent reputation for product quality and reliability at a competitive price.

To learn more about the QSI range of laser diodes, visit our QSI Laser Diodes page, or to see the full range of laser diodes available from ProPhotonix ,visit our laser diode selector.

With more than 20 years’ experience in laser diode technology, ProPhotonix is uniquely positioned to support you in selecting the optimum laser diode for your application. For support in selecting the right laser diode for your application, contact us.


Subscribe For Updates

Stay up to date with relevant product updates, updates on events, whitepaper and case study release notifications and company news.