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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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3D printed and spiral lithographically patterned erbium-doped polymer micro-waveguide amplifiers.

Hongwei Gao1, Huimin Li2, G F R Chen1

  • 1Photonics Devices and System Group, Singapore University of Technology and Design, 8 Somapah Rd, Singapore, 487372, Singapore.

Scientific Reports
|October 29, 2021
PubMed
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Researchers developed novel polymeric waveguide amplifiers using lithography and 3D printing. These devices, doped with erbium ions (Er 3+), achieve significant optical gain within the telecommunication wavelength range.

Area of Science:

  • Optoelectronics and Photonics
  • Materials Science

Background:

  • Rare-earth (RE) doped materials are crucial for integrated optical devices, including fiber amplifiers and telecommunications.
  • Trivalent erbium ions (Er 3+) are particularly important for their emission in the 1300-1650 nm low-loss telecommunication window.

Purpose of the Study:

  • To report the development and performance of two types of polymeric waveguide amplifiers.
  • To demonstrate the feasibility of using 3D printing for fabricating active photonic devices.

Main Methods:

  • Fabrication of lithographically patterned spiral waveguides.
  • Development of polymeric waveguide amplifiers using 3D printing via two-photon lithography.

Main Results:

  • Achieved 8 dB gain in 8 cm long spiral waveguides with 95 mW of 980 nm pump power.

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  • Observed gain in the 1530-1590 nm range.
  • Demonstrated the first polymeric waveguide amplifiers fabricated using 3D printing.

    • Conclusions:

    • Polymeric waveguide amplifiers offer a promising platform for optical amplification.
    • 3D printing enables rapid prototyping of active photonic devices, potentially overcoming planar limitations.