Add–drop filter with complex waveguide Bragg grating and multimode interferometer operating on arbitrarily spaced channels

Xie, Shengjie; Zhan, Jiahao; Hu, Yiwen; Zhang, Yang; Veilleux, Sylvain; Bland-Hawthorn, Joss; Dagenais, M.

doi:10.1364/ol.43.006045

Cited by 25 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we propose an integrated EOM on LNOI based on a waveguide Bragg grating (WBG) structure for intensity modulation (IM) systems with direct detection (DD). WBGs are the integrated photonics counterparts of the well-known fiber Bragg gratings with applications in wavelength division multiplexing and photonic signal processing [15], [16]. In LNOI, integrated waveguide gratings as well as the linear electro-optic shift of the transmission spectrum have been previously demonstrated [17], [18].…”

Section: Introductionmentioning

confidence: 99%

100-GBd Waveguide Bragg Grating Modulator in Thin-Film Lithium Niobate

Pohl

Messner

Kaufmann

et al. 2021

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

100-GBd Waveguide Bragg Grating Modulator in Thin-Film Lithium Niobate

Pohl

Messner

Kaufmann

et al. 2021

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

“…4 shows that the grating sidewall corrugation is well defined, which is important for low-loss applications. Compared with our previous work on complex gratings [14], [30], we use a continuous sinusoidal structure instead of sampled discrete rectangular pieces. This optimization makes our grating design more consistent with the DLP model.…”

Section: Fabrication and Loss Measurementmentioning

confidence: 99%

Integrated Arbitrary Filter With Spiral Gratings: Design and Characterization

Xie

Zhan

et al. 2020

J. Lightwave Technol.

Self Cite

View full text Add to dashboard Cite

We report the design and characterization of a high performance integrated arbitrary filter from 1450 nm to 1640 nm. The filter's target spectrum is chosen to suppress the night-sky OH emission lines, which is critical for ground-based astronomical telescopes. This type of filter is featured by its large spectral range, high rejection ratio and narrow notch width. Traditionally it is only successfully accomplished with fiber Bragg gratings. The technique we demonstrate here is proven to be very efficient for on-chip platforms, which can bring many benefits for device footprint, performance and cost. For the design part, two inverse scattering algorithms are compared, the frequency domain discrete layer-peeling (f-DLP) and the time domain discrete layer-peeling (t-DLP). f-DLP is found to be superior for the grating reconstruction in terms of accuracy and robustness. A method is proposed to resolve the non-uniformity issue caused by the non-zero layer size in the DLP algorithm. The designed 55-notch filter is 50-mm-long and implemented on a compact Si 3 N 4 /SiO 2 spiral waveguide with a total length of 63 mm. Experimentally, we demonstrate that the device has a insertion loss as low as 2.5 dB, and that the waveguide propagation loss is as low as 0.10 dB/cm. We are also able to achieve uniform notch depths and 3-dB widths of about 28 dB and 0.22 nm, respectively. a denotes the widths of narrow -wide part of a simple Bragg grating. sign for the R&D of large-scale photonic circuits with increasing flexibility and complexity.

show abstract

“…4,5 These devices have been demonstrated for atmospheric OH-emission suppression in the near-IR 6 and are currently under development for filtering exoplanet biosignatures. 7 Photonic ring resonators are also being adapted, along the same lines, to accomplish OH-emission suppression. 8 3.…”

Section: Complex Bragg-gratingsmentioning

confidence: 99%