637nm Lasers

What are 637nm Lasers?

637nm red laser diodes and red laser modules are available with both single-mode and multi-mode beam profiles. They have either free space or fiber coupled outputs.

The diode laser packages are ideal for OEM applications, and laser modules are available for either OEM or plug and play applications.

Filters Reset


Wavelength Selection

Power Selection






Picture Part Number Type Wavelength (nm) Output power (W) Mode Output Linewidth Pulse energy (uJ) Pulse width Rep rate
HL637: 637nm Laser Diode HL637 Single Emitter 637 0.007, 0.120, 0.250, 0.450, 1.0, 1.2 Single-Mode, Multimode Free Space
QL63F5SA QL63F5SA Single Emitter 637 0.010 Single-Mode Free Space

HL Series


The HL Series offers versatile and high-quality laser diode products in a variety of wavelengths and high-power options, ideal for direct imaging, industrial, and bio/medical applications. These reliable, efficient, and compact diodes come in TO-Can packages, making them perfect for OEM integration. Additionally, they operate with TE mode oscillation and are RoHS compliant, ensuring safe use. Choose the HL Series for quality, reliability, and performance in laser diodes.