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  • Received: Jul. 23, 2020

    Accepted: Sep. 22, 2020

    Posted: Dec. 10, 2020

    Published Online: Jan. 4, 2021

    The Author Email: Feng Chen (drfchen@sdu.edu.cn)

    DOI: 10.3788/COL202119.021301

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    Chi Pang, Rang Li, Ziqi Li, Ningning Dong, Jun Wang, Feng Ren, Feng Chen. Multi-gigahertz laser generation based on monolithic ridge waveguide and embedded copper nanoparticles[J]. Chinese Optics Letters, 2021, 19(2): 021301

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Chinese Optics Letters, Vol. 19, Issue 2, 021301 (2021)

Multi-gigahertz laser generation based on monolithic ridge waveguide and embedded copper nanoparticles

Chi Pang1, Rang Li1,2, Ziqi Li1, Ningning Dong3, Jun Wang3, Feng Ren4, and Feng Chen1,*

Author Affiliations

  • 1School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • 2Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
  • 3Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 4Department of Physics, Center for Ion Beam Application and Center for Electron Microscopy, Wuhan University, Wuhan 430072, China

Abstract

Copper (Cu) nanoparticles (NPs) are synthesized under the near-surface region of the Nd:Y3Al5O12 (Nd:YAG) crystal by direct Cu+ ions implantation. Subsequently, the monolithic ridge waveguide with embedded Cu NPs is fabricated by C4+ ions irradiation and diamond saw dicing. The nonlinear optical response of the sample is investigated by the Z-scan technique, and pronounced saturable absorption is observed at the 1030 nm femtosecond laser. Based on the obvious saturable absorption of Cu NPs embedded Nd:YAG crystal, 1 μm monolithic mode-locked pulsed waveguide laser is implemented by evanescent field interaction between NPs and waveguide modes, reaching the pulse duration of 24.8 ps and repetition rate of 7.8 GHz. The work combines waveguides with NPs, achieving pulsed laser devices based on monolithic waveguide chips.

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