Showing papers by "Mario J. Paniccia published in 2020"
TL;DR: In this paper, an electrically-pumped integrated laser with a record high $Q$ factor over 260 million and finesse over 42,000 was demonstrated, and for the first time, fundamental noise below 1 Hz$^2$ Hz$^{-1}$ was achieved in a pump laser.
Abstract: Driven by narrow-linewidth bench-top lasers, coherent optical systems spanning optical communications, metrology and sensing provide unrivalled performance. To transfer these capabilities from the laboratory to the real world, a key missing ingredient is a mass-produced integrated laser with superior coherence. Here, we bridge conventional semiconductor lasers and coherent optical systems using CMOS-foundry-fabricated microresonators with record high $Q$ factor over 260 million and finesse over 42,000. Five orders-of-magnitude noise reduction in the pump laser is demonstrated, and for the first time, fundamental noise below 1 Hz$^2$ Hz$^{-1}$ is achieved in an electrically-pumped integrated laser. Moreover, the same configuration is shown to relieve dispersion requirements for microcomb generation that have handicapped certain nonlinear platforms. The simultaneous realization of record-high $Q$ factor, highly coherent lasers and frequency combs using foundry-based technologies paves the way for volume manufacturing of a wide range of coherent optical systems.
24 citations
Patent•
26 Jun 2020
TL;DR: In this article, a waveguide design on the integrated photonics chip, acting as a front-end chip, ensures precise detection of phase change in a fiber coil or a sensing chip having waveguide coil or ring resonator, where the sending chip is coupled to the front end chip.
Abstract: The present disclosure relates to system-level integration of lasers, electronics, integrated photonics-based optical components and a sensing chip. Novel waveguide design on the integrated photonics chip, acting as a front-end chip, ensures precise detection of phase change in a fiber coil or a sensing chip having a waveguide coil or ring resonator, where the sending chip is coupled to the front end chip. Strip waveguides are designed to primarily select TE mode over TM mode when laser light is coupled into the integrated photonics chip. A plurality of mode-selective filters, based on multi-mode interference (MMI) filter, a serpentine structure, or other types of waveguide-based mode-selective structure, are introduced in the system architecture. Additionally, implant regions are introduced around the waveguides and other optical components to block unwanted/stray light into the waveguides and optical signal leaking out of the waveguide.
2 citations
Patent•
02 Apr 2020TL;DR: In this article, a module for optically and structurally coupling a light diffusion optical fiber to a laser diode on a substrate in a compact module includes a fiber holder into which an exposed core of the laser extends and which is placed about the laser on the substrate such that the laser and fiber are axially aligned in a butt coupled relation.
Abstract: A module for optically and structurally coupling a light diffusion optical fiber to a laser diode on a substrate in a compact module includes a fiber holder into which an exposed core of the laser extends and which is placed about the laser on a substrate such that the laser and fiber are axially aligned in butt coupled relation A resilient strain relief housing is secured about the light receiving end of the fiber, and the fiber holder and substrate are inserted into the housing in a secured in a water sealing engagement
1 citations
Patent•
15 Oct 2020
TL;DR: In this article, a small-footprint integrated photonics optical gyroscope is presented, which can provide ARW in the range of 0.05°/√Hr or below (e.g. as low as 0.02°/Hr), which makes them comparable to fiber optic gyroscopes (FOGs) in terms of performance at a much lower cost.
Abstract: Novel small-footprint integrated photonics optical gyroscopes disclosed herein can provide ARW in the range of 0.05°/√Hr or below (e.g. as low as 0.02°/√Hr), which makes them comparable to fiber optic gyroscopes (FOGs) in terms of performance, at a much lower cost. The low bias stability value in the integrated photonics optical gyroscope corresponds to a low bias estimation error (in the range of 1.5°/Hr or even lower) that is crucial for safety-critical applications, such as calculating heading for autonomous vehicles, drones, aircrafts etc. The integrated photonics optical gyroscopes may be co-packaged with mechanical gyroscopes into a hybrid inertial measurement unit (IMU) to provide high-precision angular measurement for one or more axes.
Patent•
05 Jun 2020
TL;DR: Low-loss waveguide-based gyro coils may be patterned in the shape of a spiral (circular or rectangular or any other shape), that may be distributed among one or more of vertical planes to increase the length of the optical path while avoiding the increased loss caused by intersecting waveguides in the state-of-the-art designs as discussed by the authors.
Abstract: Disclosed herein are configurations and methods to produce very low loss waveguide structures, which can be single-layer or multi-layer. These waveguide structures can be used as a sensing component of a small-footprint integrated optical gyroscope. By using pure fused silica substrates as both top and bottom cladding around a SiN waveguide core, the propagation loss can be well below 0.1 db/meter. Low-loss waveguide-based gyro coils may be patterned in the shape of a spiral (circular or rectangular or any other shape), that may be distributed among one or more of vertical planes to increase the length of the optical path while avoiding the increased loss caused by intersecting waveguides in the state-of-the-art designs. Low-loss adiabatic tapers may be used for a coil formed in a single layer where an output waveguide crosses the turns of the spiraling coil.