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Compact and low-loss silicon power splitter based on inverse tapers
Optics Letters
|December 11, 2013
Summary
Researchers developed a compact optical power splitter using inverse tapers on silicon-on-insulator. This device achieves low loss and high uniformity, enabling ultrahigh density photonic integration.
Area of Science:
- Photonics
- Materials Science
- Optical Engineering
Background:
- Optical power splitters are crucial components in photonic integrated circuits.
- Existing splitters often face limitations in size, loss, or uniformity.
Purpose of the Study:
- To propose and fabricate a compact, low-loss optical power splitter.
- To achieve high-efficiency mode evolution for improved performance.
Main Methods:
- Design and fabrication of an optical power splitter utilizing inverse tapers.
- Optimization of tapers for efficient mode evolution on a silicon-on-insulator platform.
- Characterization of a 1x4 splitter for insertion loss, uniformity, and footprint.
Main Results:
- Demonstrated a 1x4 optical power splitter with insertion loss below 0.4 dB.
- Achieved uniformity better than 0.68 dB across a 1510-1550 nm wavelength range.
- The device occupies a compact footprint of approximately 75 μm².
Conclusions:
- The proposed inverse taper-based splitter offers excellent performance in a small footprint.
- This technology is highly promising for advancing ultrahigh density photonic integration.
- The demonstrated low loss and high uniformity are critical for scalable photonic circuits.
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