Low-loss erbium-doped ion-exchanged channel waveguides

Area of Science:

• Materials Science
• Optoelectronics
• Glass Science

Background:

• Erbium-doped glasses are crucial for optical amplifiers and lasers.
• Channel waveguides enable light confinement and manipulation in integrated photonic devices.
• Ion-exchange is a common technique for fabricating optical waveguides in glass.

Purpose of the Study:

• To fabricate ion-exchanged channel waveguides in Er-doped Na-modified BK-7 glass.
• To characterize the optical properties and loss of these waveguides.
• To assess their suitability for photonic applications.

Main Methods:

• Fabrication of buried channel waveguides via ion-exchange in Er-doped Na-modified BK-7 glass.
• Characterization of waveguide cross-section and dimensions (10 µm x 30 µm).
• Optical property assessment, including mode analysis and loss measurement at 0.633 µm.

Main Results:

• Successfully fabricated elliptical, buried channel waveguides.
• Waveguides exhibited single-mode behavior in the 10 µm dimension and multi-mode behavior in the 30 µm dimension.
• Achieved a low total waveguide loss of 0.8 dB/cm at 0.633 µm.

Conclusions:

• Ion-exchanged Er-doped BK-7 glass can form functional channel waveguides.
• The demonstrated optical properties and low loss are promising for integrated optics.
• These waveguides could be utilized in various photonic devices, such as amplifiers and lasers.