METHODS AND APPARATUS FOR MODE-LOCKING ON-CHIP LASERS

WIPO Patent Application WO/2018/044363

A3

An artificial saturable absorber uses additive pulse mode-locking to enable pulse operation of an on-chip laser operation. Four different artificial saturable absorbers are disclosed. The first includes an integrated coupler, two arms each containing some implementation of the end-reflector, and a phase bias element in one arm. The second includes an integrated directional coupler, two integrated waveguide arms, and another integrated coupler as an output. The third includes an integrated birefringent element, integrated birefringent-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 the modes. These are just some examples of an on-chip fully integrated artificial saturable absorber with instantaneous recovery time that allow for generation of sub-femtosecond optical pulses at high repetition rates using passive mode-locking.

SHTYRKOVA KATIA (US)
KAERTNER FRANZ X (DE)
CALLAHAN PATRICK T (US)
WATTS MICHAEL R (US)
IPPEN ERICH P (US)

PCT/US2017/032088

April 26, 2018

May 11, 2017

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MASSACHUSETTS INST TECHNOLOGY (US)

G01J4/00; H01S3/05; H01S3/04; H01S3/08; H01S3/098; H01S3/10

US20090310631A1	2009-12-17
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US6903820B2	2005-06-07
US5175736A	1992-12-29
US20100296529A1	2010-11-25
US6275512B1	2001-08-14
US6710911B2	2004-03-23
US6031851A	2000-02-29

COLICE, Christopher Max et al. (1299 Pennsylvania Avenue NW Suite 70, Washington District of Columbia, US)

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