Patent

PUBDB-2021-05083

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Methods and Apparatus for Mode-Locking on-Chip Lasers

Shtyrkova, K.DESY* ; Kärtner, F.CFEL*XFEL.EU*DESY* ; Callahan, P. T.Extern* ; watts, m. ; ippen, e.

2018

Patent No.: WO 2018/044363 A3;

Abstract: An artificial saturable absorber uses additive pulse mode-locking to enable pulse operation of an on-chip laser operationFour different artificial saturable absorbers are disclosed. The first includes an integrated coupler, two arms each containing someimplementation of the end-reflector, and a phase bias element in one arm. The second includes an integrated directional coupler, twointegrated waveguide arms, and another integrated coupler as an output. The third includes an integrated birefringent element, integratedbirefringent-free waveguide, and integrated polarizer. And the fourth includes a multimode waveguide that allows for different modes © to propagate in such a way that the difference in the spatial distribution of intensity causes a nonlinear phase difference between the00 modes. These are just some examples of an on-chip fully integrated artificial saturable absorber with instantaneous recovery time thatf , allow for generation of sub-femtosecond optical pulses at high repetition rates using passive mode-locking.

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Contributing Institute(s):

1. FS-CFEL-2 (CFEL-ULOCM)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)

Experiment(s):

1. Experiments at CFEL

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