Increased power of broad-area lasers (808nm/980nm) and applicability to 10-mm bars with up to 1000Watt QCW

Abstract

The new packaging technology from JENOPTIK Laserdiode GmbH and the new chip technology from JENOPTIK Diode Lab GmbH increases the output power, the quality and durability of new broad area lasers. Tests with different pulse widths and duty cycles have been conducted. A maximum linear power density of 213mW/&mgr;m has been found for 808nm and 980nm laser, limited by thermal rollover. The tests were performed for duty cycles from 0.1% to 5% and pulse widths of 50&mgr;s and 100&mgr;m. Over 32W output power was reached for 150&mgr;m emitter at a 0.1 % duty cycle and 50&mgr;s pulse length. With the new diode laser technology 10mm bars with a 44% filling factor were produced. These laser bars, mounted on micro channel coolers, reached a maximum output power of 1000W. To our knowledge this is the highest power reported up to now for 980nm material with 100&mgr;s pulses and 0.1% duty cycle.