Nanotechnology Now – Press Release: New tech builds ultralow-loss integrated photonic circuits

House > Press > New tech builds ultralow-loss built-in photonic circuits

Integrated silicon nitride photonic chips with meter-long spiral waveguides.

CREDIT
Jijun He, Junqiu Liu (EPFL)
Built-in silicon nitride photonic chips with meter-long spiral waveguides.

CREDIT
Jijun He, Junqiu Liu (EPFL)

Summary:
Encoding info into mild, and transmitting it by way of optical fibers lies on the core of optical communications. With an extremely low lack of zero.2 dB/km, optical fibers constituted of silica have laid the foundations of at present’s international telecommunication networks and our info society.

New tech builds ultralow-loss built-in photonic circuits


Lausanne, Switzerland | Posted on April 16th, 2021

Such ultralow optical loss is equally important for built-in photonics, which allow the synthesis, processing and detection of optical indicators utilizing on-chip waveguides. At this time, various revolutionary applied sciences are primarily based on built-in photonics, together with semiconductor lasers, modulators, and photodetectors, and are used extensively in knowledge facilities, communications, sensing and computing.

Built-in photonic chips are normally constituted of silicon that’s ample and has good optical properties. However silicon cannot do all the pieces we’d like in built-in photonics, so new materials platforms have emerged. One in all these is silicon nitride (Si3N4), whose exceptionally low optical loss (orders of magnitude decrease than that of silicon), has made it the fabric of alternative for functions for which low loss is essential, corresponding to narrow-linewidth lasers, photonic delay strains, and nonlinear photonics.

Now, scientists within the group of Professor Tobias J. Kippenberg at EPFL’s Faculty of Fundamental Sciences have developed a brand new expertise for constructing silicon nitride built-in photonic circuits with document low optical losses and small footprints. The work is revealed in Nature Communications.

Combining nanofabrication and materials science, the expertise relies on the photonic Damascene course of developed at EPFL. Utilizing this course of, the group made built-in circuits of optical losses of only one dB/m, a document worth for any nonlinear built-in photonic materials. Such low loss considerably reduces the ability price range for constructing chip-scale optical frequency combs (“microcombs”), utilized in functions like coherent optical transceivers, low-noise microwave synthesizers, LiDAR, neuromorphic computing, and even optical atomic clocks. The group used the brand new expertise to develop meter-long waveguides on 5×5 mm2 chips and high-quality-factor microresonators. In addition they report excessive fabrication yield, which is crucial for scaling as much as industrial manufacturing.

“These chip units have already been used for parametric optical amplifiers, narrow-linewidth lasers and chip-scale frequency combs”, says Dr. Junqiu Liu who led the fabrication at EPFL’s Middle of MicroNanoTechnology (CMi). “We’re additionally wanting ahead to seeing our expertise getting used for rising functions corresponding to coherent LiDAR, photonic neural networks, and quantum computing.”

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For extra info, please click on right here

Contacts:
Nik Papageorgiou

41-216-932-105

@EPFL_en

Copyright © Ecole Polytechnique Fdrale de Lausanne

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