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Conference 11983 > Paper 11983-15
Paper 11983-15

High-brightness 1.4kW 780nm QCW laser pump module with low-loss coupling into 1mm fiber up to 50% duty cycle

Abstract

Progress in high duty-cycle quasi-continuous-wave pump modules at 780 nm is presented, based on innovative passively-side-cooled stacks of wide-aperture single emitters. The modules emit power of 1.4 kW in free space and 1 kW ex-fiber (1 mm core 0.22 NA) at 10% duty cycle (10 ms, 10 Hz). Efforts to scale to higher duty cycles are summarized, showing the innovative cooling approach allows 50% duty cycle operation (10 ms, 50 Hz) with low losses, without the need for microchannels. Recent efforts to further increase conversion efficiency by implementing more advanced low loss diode laser designs are also presented.

Presenter

Marko Hübner
Ferdinand-Braun-Institut (Germany)
Presenter/Author
Marko Hübner
Ferdinand-Braun-Institut (Germany)
Author
Ferdinand-Braun-Institut (Germany)
Author
Ferdinand-Braun-Institut (Germany)
Author
Andre Maassdorf
Ferdinand-Braun-Institut (Germany)
Author
Ferdinand-Braun-Institut (Germany)
Author
Arnim Ginolas
Ferdinand-Braun-Institut (Germany)
Author
Ferdinand-Braun-Institut (Germany)
Author
Ferdinand-Braun-Institut (Germany)