Publications using our technology
Weng et al. (2022)

Huang et al. (2022)

Liu et al. (2022), IEEE Xplore

Zia et al. (2022)

Guo et al. (2022), IEEE Xplore

Munoz et al. (2022), IEEE Xplore

With the upcoming extremely large telescopes (ELTs), the volume, mass, and cost of the associated spectrographs will scale with the telescope diameter. Astrophotonics offers a unique solution to this problem in the form of single-mode fiber-fed diffraction-limited spectrographs on a chip. These highly miniaturized chips offer great flexibility in terms of coherent manipulation of photons. Such photonic spectrographs are well-suited to disperse the light from directly imaged planets (post-coronagraph, collected using a single-mode fiber) to characterize exoplanet atmospheres. Here we present the results from a proof-of-concept high-resolution astrophotonic spectrograph using the arrayed waveguide gratings (AWG) architecture. This chip uses the low-loss SiN platform (SiN core, SiO2 cladding) with square waveguides (800 nm × 800 nm). The AWG has a measured resolving power (λ/δλ) of ∼ 12,000 and a free spectral range (FSR) of 2.8 nm. While the FSR is small, the chip operates over a broad band (1200 − 1700 nm). The peak on-chip throughput (excluding the coupling efficiency) is ∼40\% (- 4 dB) and the overall throughput (including the coupling loss) is ∼ 11\% (- 9.6 dB) in the TE mode. Thanks to the high-confinement waveguide geometry, the chip is highly miniaturized with a size of only 7.4 mm × 2 mm.
This demonstration highlights the utility of SiN platform for astrophotonics, particularly, the capability of commercial SiN foundries to fabricate ultra-small, high-resolution, high-throughput AWG spectrographs on a chip suitable for both ground- and space-based telescopes.
Gatkine et al. (2022)

Calò et al. (2022)

Nitiss et al., Nature Photonics (2022)

Lee et al., Optics Communications (2022)

Lee et al., Photonics Research (2022)

Jha et al. (2021)

Guo et al., IEEE Xplore (2021)

Kuse et al., Optical Society of America (2021)

Rao et al., Light Science & Applications (2021)

Tetsumoto et al., Nature Photonics (2021)

Zhang et al., Nature Communications (2021)

Im et al., IEEE (2021)

Chatzitheocharis et al., SPIE (2021)

Arrazola et al., Nature (2021)

Bhandari et al., Optics Letters (2020)

Im et al., IEEE (2020)

Stanley Cheung and Michael R.T Tan, IEEE (2020)

Nitiss et al., Optics Letters (2020)

Tian et al., Nature Communications (2020)

Stanley Cheung and Michael R.T Tan, Journal of Lightwave Technology (2020)

Yu et al., Optics Express (2020)

Kuse et al., Optics Letters (2020)

Briles et al., arXiv (2020)

Zhang et al., scienceOPEN (2020)

Tan et al., arXiv (2019)

Obrzud et al., Optics Letters (2019)

Metcalf et al., Optica (2019)

Bowers et al., Gomatech (2019)

Obrzud et al., Nature Photonics (2019)

Vaidya et al., arXiv (2019)

Yu et al., Physical Review Applied (2018)

Porcel et al., Science Direct (2018)

Spencer et al., Nature (2018)

Manurkar et al., OSA Continuum (2018)

Carlson et al., Science (2018)

Hickstein et al., Physical Review Letters (2017)

Lamb et al., Physical Review Applied (2017)

Brasch et al., Optics Express (2014)

Brasch et al., Science (2016)

Chang et al., Optics Letters (2017)

Weng et al. (2022)

Huang et al. (2022)

Liu et al. (2022), IEEE Xplore

Zia et al. (2022)

Guo et al. (2022), IEEE Xplore

Munoz et al. (2022), IEEE Xplore

Gatkine et al. (2022)

Calò et al. (2022)

Nitiss et al., Nature Photonics (2022)

Lee et al., Optics Communications (2022)

Lee et al., Photonics Research (2022)

Guo et al., IEEE Xplore (2021)

Kuse et al., Optical Society of America (2021)

Rao et al., Light Science & Applications (2021)

Tetsumoto et al., Nature Photonics (2021)

Zhang et al., Nature Communications (2021)

Im et al., IEEE (2021)

Chatzitheocharis et al., SPIE (2021)

Arrazola et al., Nature (2021)

Bhandari et al., Optics Letters (2020)

Im et al., IEEE (2020)

Stanley Cheung and Michael R. T. Tan, IEEE (2020)

Nitiss et al., Optics Letters (2020)

Tian et al., Nature Communications (2020)

Stanley Cheung and Michael R.T Tan, Journal of Lightwave Technology (2020)

Yu et al., Optics Express (2020)

Kuse et al., Optics Letters (2020)

Briles et al., arXiv (2020)

Zhang et al., arXiv (2020)

Tan et al., arXiv (2019)

Obrzud et al., Optics Letters (2019)

Bowers et al., Gomatech (2019)

Obrzud et al., Nature Photonics (2019)

Vaidya et al., arXiv (2019)

Yu et al., Physical Review Applied (2018)

Porcel et al., Science Direct (2018)

Spencer et al., Nature (2018)

Manurkar et al., OSA Continuum (2018)

Carlson et al., Science (2018)

Hickstein et al., Physical Review Letters (2017)

Lamb et al., Physical Review Applied (2017)

Brasch et al., Optics Express (2014)

Brasch et al., Science (2016)

Chang et al., Optics Letters (2017)