Watt-class CMOS-compatible power amplifier

Neetesh Singh, Jan Lorenzen, Milan Sinobad, Kai Wang, Mahmoud A. Gaafar, Henry Francis, Michael Geiselmann, Tobias Herr, Sonia M. Garcia-Blanco, Franz X. Kärtner

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

Watt-level optical amplifiers have various applications such as laser detection and ranging, modelocked lasers, frequency combs and laser surgery. However, power amplifiers are usually limited to solid-state and fibre-based technologies, as in integrated photonics the very property of tight mode confinement becomes an impediment to high power applications due to small optical mode cross-section, and thus limiting powers to a few 10s of milliwatt range at best [1]. Semiconductor based slab coupled waveguide amplifiers [2] can allow for large mode area thus high power; the integration, however, has proven to be challenging. Rare earth doped chip-scale amplifier recently reached signal level >100 mW, however, that is at the expense of a complex fabrication process [3]. The situation is even worse beyond telecom wavelength window, in the mid-infrared, where only a few mWs of amplified signal has so far been achieved [4]. Here, we demonstrate for the first time a CMOS compatible watt-scale power amplifier with signal amplification up to >0.9 W in a compact footprint of 3.6mm2 in the eye safe window. The signal power reaches a level enjoyed by commercial bench top fiber amplifiers [5].

Original languageEnglish
Title of host publication2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
PublisherIEEE
ISBN (Electronic)9798350345995
DOIs
Publication statusPublished - 4 Sept 2023
Event2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023 - Munich, Germany
Duration: 26 Jun 202330 Jun 2023

Conference

Conference2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Country/TerritoryGermany
CityMunich
Period26/06/2330/06/23

Keywords

  • 2024 OA procedure

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