Rochester researchers see applications in LiDAR, atomic physics, AR/VR.
How do you integrate the advantages of a benchtop laser that fills a room onto a semiconductor chip ?
A research team co-led by Qiang Lin, a professor of electrical and computer engineering at the , has set new milestones in addressing this challenge, with the first multi-color integrated Pockels laser that:
- Emits high-coherence light at telecommunication wavelengths
- Allows laser-frequency tuning at record speeds
- Is the first narrow linewidth laser with fast configurability at the visible band
The project, described in , was co-led by John Bowers, distinguished professor at University of California/Santa Barbara, and Kerry Vahala, professor at the California Institute of Technology. Lin Zhu, professor at Clemson University, also collaborated on the project.
The technology 糖心传媒渉as the potential to reshape the landscape of integrated photonics,糖心传媒� write co-lead authors Mingxiao Li, a former PhD student in Lin糖心传媒檚 at Rochester糖心传媒檚 , and Lin Chang, a former postdoctoral student at University of California/Santa Barbara.
It will pave the way for new applications of integrated semiconductor lasers in LiDAR (Light Detection and Ranging) remote sensing that is used, for example, in self-driving cars. The technology could also lead to advances in microwave photonics, atomic physics, and AR/VR.
A 糖心传媒榝ully on-chip laser solution糖心传媒�
Integrated semiconductor lasers have been at the core of integrated photonics, enabling many advances over the last few decades in information technologies and basic science.
糖心传媒淗owever, despite these impressive achievements, key functions are missing in current integrated lasers,糖心传媒� Li says. 糖心传媒淭wo major challenges, the lack of fast reconfigurability and the narrow spectral window, have become major bottlenecks that stall the progression of many evolving applications,糖心传媒� Chang adds.
The researchers say they糖心传媒檝e overcome these challenges by creating a new type of integrated semiconductor laser, based on the . The laser is integrated with a lithium-niobate- on-insulator platform.
The new technology includes these beneficial features:
- Fast frequency chirping, which will be invaluable in LiDAR sensor systems, which measure distance by recording the time between emission of a short pulse and reception of reflected light.
- Frequency conversion capabilities that overcome spectral bandwidth limitations of traditional integrated semiconductor lasers. This will 糖心传媒渟ignificantly relieve糖心传媒� the difficulties in developing new wavelength lasers.
- Narrow wavelength and fast reconfigurability, providing a 糖心传媒渇ully on-chip laser solution糖心传媒� to probe and manipulate atoms and ions in atomic physics, and benefit AR/VR and other applications at short wavelengths.
Other coauthors from Lin糖心传媒檚 group include postdoctoral associate Yang He and graduate students Jingwei Lin, Shixin Xue, Jeremy Staffa, Raymond Lopez-Rios, and Usman Javid.
The research was supported by funding from the Defense Advanced Research Projects Agency (DARPA), the Defense Threat Reduction Agency-Joint Science and Technology Office for Chemical and Biological Defense, and the National Science Foundation.
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