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Ushio Inc., the leading Japanese lighting solutions company, has announced the release of its two new violet laser diodes (LDs), HL40113MG and HL40115MG, emitting a wavelength of 405nm. The new diodes have a continuous wave (CW) optical output power of 600mW. Although the diodes share characteristics with existing Ushio LDs, they bring several significant areas of improvement. These include wall-plug efficiency (WPE), slope efficiency, and an extended overall lifetime.
For comparison, HL40113MG and HL40115MG offer a seven-point increase in wall-plug efficiency over the existing Ushio LDs HL40063MG and HL40065MG (the WPE values are 28.6% and 21.4%, respectively), further reducing power consumption, and heat dissipation requirements. HL40113MG and HL40115MG also provide an 18% improvement in slope efficiency compared to HL40063MG or HL40065MG, creating advancements for overall system optimisation.
The newer diodes additionally improve their LD lifetime by 40% in comparison to HL40063MG and HL40065MG. Ushio’s persistent development of its laser collection enables longer-lasting, more productive, and more cost-efficient violet laser systems. These specific laser diodes are optimised for applications such as laser direct imaging, including photo-lithography and printed circuit board (PCB) manufacturing, as well as many bio-medical and life science fields.

Specifications of HL40113MG and HL40115MG Laser Diodes
- Optical Output Power: 600mW (CW)
- Visible Lasing (violet): 405nm
- Low Operating Current: 500mA Typ.
- Low Operating Voltage: 4.2V Typ.
- Built-in Monitoring Photodiode (HL40115MG only)
- Small Package: φ5.6mm Can
- Multiple Transverse Mode
- TE Mode Oscillation
Applications
- Direct Imaging
- Measurement
- Bio-medical
Packaging
- Ushio standard MG (TO-56) package; two internal circuits available