Stanton Eric J, Volet Nicolas, Bowers John E
Opt Lett. 2018 Mar 1;43(5):1135-1138. doi: 10.1364/OL.43.001135.
Low-loss arrayed waveguide gratings (AWGs) are demonstrated at a 2.0-μm wavelength. These devices promote rapidly developing photonic applications, supported by the recent development of mid-infrared lasers integrated on silicon (Si). Multi-spectral photonic integrated circuits at 2.0-μm are envisioned since the AWGs are fabricated with the 500-nm-thick Si-on-insulator platform compatible with recently demonstrated lasers and semiconductor optical amplifiers on Si. Characterization with the AWG-ring method improves the on-chip transmission uncertainty to ∼6% compared to the conventional method with an uncertainty of ∼53%. Channel losses of ∼2.4 dB are found, with -31 dB crosstalk per channel. Fully integrated multi-spectral sources at 2.0 μm with pump lasers, low-loss multiplexers, and an output amplifier are now feasible.
低损耗阵列波导光栅（AWG）在2.0微米波长下得到了验证。这些器件推动了光子应用的快速发展，这得益于近期集成在硅（Si）上的中红外激光器的发展。由于AWG是在与近期在硅上展示的激光器和半导体光放大器兼容的500纳米厚绝缘体上硅平台上制造的，因此设想了2.0微米的多光谱光子集成电路。与不确定性约为53%的传统方法相比，采用AWG环法进行表征可将片上传输不确定性提高到约6%。发现通道损耗约为2.4分贝，每个通道的串扰为-31分贝。现在，配备泵浦激光器、低损耗复用器和输出放大器的2.0微米全集成多光谱源已切实可行。
