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Demonstration of complementary apodized cascaded grating waveguides for tunable optical delay lines
Optics Letters
|October 2, 2013
Summary
Integrated silicon photonic delay lines were developed using complementary grating waveguides. These novel devices offer tunable, high-speed operation with low loss, enabling potential data rates of 107 Gb/s.
Area of Science:
- Photonics
- Integrated Optics
- Silicon Photonics
Background:
- Tunable delay lines are crucial for high-speed optical communication systems.
- Dispersion management is a key challenge in achieving high bit rates.
- Silicon photonics offers a scalable platform for integrated optical devices.
Purpose of the Study:
- To demonstrate high-speed, tunable integrated silicon photonic delay lines.
- To investigate the use of cascaded complementary apodized silicon grating waveguides for dispersion compensation.
- To characterize the performance of these novel delay lines.
Main Methods:
- Cascading complementary apodized silicon grating waveguides with super-Gaussian profiles.
- Characterizing the optical loss, true time delay, and tuning range of the delay lines.
- Evaluating the potential operating bit rate.
Main Results:
- The cascaded grating waveguides successfully compensated for dispersion.
- The compact delay lines exhibited low loss.
- True time delays of 82 ps and a tuning range of 32 ps were achieved.
- Potential operation at bit rates up to 107 Gb/s was demonstrated.
Conclusions:
- The developed silicon photonic delay lines are effective for high-speed, tunable signal processing.
- The complementary apodization technique is a viable method for dispersion compensation in silicon photonics.
- These devices hold promise for next-generation optical communication networks.
