Photonic – Compact blue-violet laser diodes for industrial / medical environments

Jan 21 2008 - Switches, Relays & Onboard [More Switches, Relays & Onboard Articles]

Tiny blue-violet laser diodes are now available in industrial strength and power, from Photonic Products. The Sanyo 405nm laser diodes which offer 20mW, 45mW or a high 85mW optical output power, the highest power available in a single-mode laser diode with an internal monitor photodiode, says the company.

This internal monitor photodiode, which can be used to accurately stabilise and control the optical output power, plus their stable beam structure, lower noise and lower current consumption, enables the blue-violet laser diodes to offer the performance required for critically demanding industrial and medical applications such as biomedical instrumentation, medical imaging, fluorescence sensing, high-resolution printing, advanced DVD and industrial alignment.

The three 405nm wavelength SANYO laser diodes are DL-4146-101S which gives 20mW optical output power with a very low threshold current of 26mA, typical operating current of 35mA, operating voltage of 4.8V and monitoring output current of 0.2mA; DL-5146-101S that offers 45mW power with a threshold current of 35mA, typical operating current of 70mA, operating voltage of 5.2V and monitoring output current of 0.3mA, and the remarkable DL-7146-101S laser diode which gives 85mW output power with a threshold current of 45mA, typical operating current of 110mA, operating voltage of 5.4V and monitoring output current of 0.3mA.

All three laser diodes have an internal monitor photodiode, a tiny package size of 5.6mm and operate at a temperature of 0 degrees Centigrade to +75C, says the company.

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