| Title: |
Tunable narrow-band single-channel add-drop integrated optical filter with ultrawide FSR |
| Authors: |
Sun, Chunlei; Yin, Yuexin; Chen, Zequn; Ye, Yuting; Luo, Ye; Ma, Hui; Wang, Lichun; Wei, Maoliang; Jian, Jialing; Tang, Renjie; Dai, Hao; Wu, Jianghong; Li, Junying; Zhang, Daming; Lin, Hongtao; Li, Lan |
| Contributors: |
National Key Research and Development Program of China; National Natural Science Foundation of China; Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang; The Open Research program of Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province; The start-up fund of Westlake University |
| Source: |
PhotoniX ; volume 3, issue 1 ; ISSN 2662-1991 |
| Publisher Information: |
Springer Science and Business Media LLC |
| Publication Year: |
2022 |
| Description: |
Free-spectral-range (FSR)-free optical filters have always been a critical challenge for photonic integrated circuits. A high-performance FSR-free filter is highly desired for communication, spectroscopy, and sensing applications. Despite significant progress in integrated optical filters, the FSR-free filter with a tunable narrow-band, high out-of-band rejection, and large fabrication tolerance has rarely been demonstrated. In this paper, we propose an exact and robust design method for add-drop filters (ADFs) with an FSR-free operation capability, a sub-nanometer optical bandwidth, and a high out-of-band rejection (OBR) ratio. The achieved filter has a 3-dB bandwidth of < 0.5 nm and an OBR ratio of 21.5 dB within a large waveband of 220 nm, which to the best of our knowledge, is the largest-FSR ADF demonstrated on a silicon photonic platform. The filter exhibits large tunability of 12.3 nm with a heating efficiency of 97 pm/mW and maintains the FSR-free feature in the whole tuning process. In addition, we fabricated a series of ADFs with different periods, which all showed reliable and excellent performances. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1186/s43074-022-00056-2 |
| DOI: |
10.1186/s43074-022-00056-2.pdf |
| DOI: |
10.1186/s43074-022-00056-2/fulltext.html |
| Availability: |
https://doi.org/10.1186/s43074-022-00056-2; https://link.springer.com/content/pdf/10.1186/s43074-022-00056-2.pdf; https://link.springer.com/article/10.1186/s43074-022-00056-2/fulltext.html |
| Rights: |
https://creativecommons.org/licenses/by/4.0 ; https://creativecommons.org/licenses/by/4.0 |
| Accession Number: |
edsbas.398FF2B4 |
| Database: |
BASE |