Polymer-based S-band waveguide amplifier using NaYF₄:Yb,Tm-PMMA nanocomposite as gain medium

Area of Science:

• Materials Science
• Photonics
• Nanotechnology

Background:

• Optical waveguide amplifiers are crucial for integrated communication systems.
• Existing research primarily targets C- and L-bands, with limited S-band solutions.
• S-band amplification is needed to expand communication system capacity.

Purpose of the Study:

• To develop a polymer-based waveguide amplifier for the S-band.
• To utilize NaYF4:Yb3+,Tm3+ nanoparticles as the gain medium.
• To achieve efficient loss compensation in the S-band.

Main Methods:

• Synthesized a NaYF4:Yb3+,Tm3+ nanoparticles-PMMA nanocomposite gain medium.
• Optimized Yb3+ doping to 20% and Tm3+ to 1% for 1480 nm emission.
• Fabricated S-band waveguide amplifiers using the developed nanocomposite.

Main Results:

• Achieved a relative gain of 5.6 dB/cm at 1480 nm.
• Demonstrated S-band amplification in a polymer-based waveguide amplifier.
• Observed amplification under 980-nm pump laser excitation.

Conclusions:

• This study presents the first polymer-based waveguide amplifier for S-band amplification.
• The developed nanocomposite offers effective loss compensation in the S-band.
• Results are expected to extend the operational waveband of polymer waveguide amplifiers.