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Ushio HL63642DG laser diodes

Ushio release HL63642DG Series high-efficiency laser diodes for levelling, show lasers and measurement applications


NEWS RELEASE: January 2022

Ushio has announced a new, 200 mW, high-power, single-mode laser diode series. Emitting a wavelength of 639 nm, the HL63642DG series boasts improvements to efficiency and features low power consumption.

Ushio acts on customer feedback to drive red laser diode technology improvements

Thanks to their high visibility, red laser diodes with oscillation wavelengths between 630 nm and 640 nm are widely used in devices such as levellers, distance meters, laser projectors, and show lasers. Since 2018 Ushio has had great success in those markets with its 639 nm HL63392DG series, also with optical output power of 200 mW. Customer feedback, however, revealed a demand for continuous improvement in characteristics and efficiency.

HL63642DG improves operational capabilities and efficiency characteristics

Ushio’s investment in housing and infrastructure has led to a demand for products such as levellers and rangefinders that operate steadily with stability for longer periods in a wide range of outdoor temperatures.

In response, Ushio has successfully reduced the threshold current and operating current by further optimising the active layer structure and chip structure parameters, resulting in a significant improvement in WPE* (Wall Plug Efficiency) compared to conventional diodes. In addition, Ushio’s engineers have extended the previous operating temperature range (-10°C to 60°C) to -40°C to 60°C. This not only reduces power consumption and extends the battery life of devices using this product, but also expands the usable environment, enabling use in e.g. extremely cold regions.


Features of HL63642DG series

  • Ushio has achieved higher efficiency and lower power consumption by reducing threshold current and operating current by more than 10% each and improving WPE* from 28% to 33% compared to conventional products.
  • Three types of internal circuits are available: cathode common (HL63641DG), anode common (HL63642DG) with a photo diode (PD), and without a photo diode (PD) (HL63643DG).

* WPE: Wall Plug Efficiency: conversion efficiency from input power to optical output power.


HL63642DG red laser diode technical specifications

  • Optical output power (CW): 200 mW (25°C), 125 mW (60°C)
  • Lasing wavelength: 639 nm
  • Wall Plug Efficiency (WPE): 33%
  • Operating Temperature: -40 to +60°C
  • Transverse Mode: Single transverse mode
  • Oscillation mode: TE mode oscillation
  • Package: 5.6 mm CAN package
  • Download preliminary datasheet HL63642DG series
Ushio HL63642DG laser diodes


Applications for HL63641DG, HL63642DG & HL63643DG

  • Levellers & rangefinders
  • Measurement light source
  • Show Lasers
  • Medical Light Source
  • Laser Module


Ushio laser diodes

All Ushio high performance laser diodes are available from the Optoelectronics Company. Please contact the Optoelectronics Company to request samples for testing.



Ushio’s laser diode collection offers wavelengths across UV (375–405 nm), red (630–690 nm), and NIR (705–852 nm), with prospective optical output powers from 5 mW to 3,500 mW. Our LD collection has low and high power lasers, with low-operating currents, long lifespans, and efficiency, all while remaining 100% RoHS-compliant.

Ushio’s Epitex division has grown into the largest collection of light emitting diodes on the market. Covering all violet, visible, and infrared wavelengths, from 365 nanometres (nm) to 1,750 nm, this vast catalogue creates a one-stop-shop for single and multi-wavelength LEDs.

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About The Optoelectronics Company Ltd

The Optoelectronics Company is a manufacturer of custom-designed and standard laser diode modules and laser diode collimators. It is also an authorised distributor and supplier of Ushio Laser Diodes and LEDs, OSRAM laser diodes and Panasonic Aspherical Glass Lenses to customers worldwide.

contact details

For more information about the Optoelectronics Company please visit our website at www.oe-company.com or contact us at: Green End Farm, Wood End Green, Henham, Hertfordshire, CM22 6AY, UK, tel: +44 (0) 1279 851851, email: info@oe-company.com.


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