Michel J. F. Digonnet
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View article: Impact of Yb<sup>2+</sup> on the anti-Stokes fluorescence cooling performance of Yb-doped silica fibers
Impact of Yb<sup>2+</sup> on the anti-Stokes fluorescence cooling performance of Yb-doped silica fibers Open
To unlock the full potential of laser-cooled silica optical fibers, a better understanding of the internal mechanisms of heat generation is required. This work explores ytterbium-doped aluminosilicate fibers produced via industry-standard …
View article: Prospects and challenges for all-optical thermal management of fiber lasers
Prospects and challenges for all-optical thermal management of fiber lasers Open
It is hard to overstate the utility of lasers in modern technology. Optical-fiber-based lasers are of particular value thanks to their combination of small form factors, afforded by the coilability of the thin strands of fiber, and high be…
View article: Material approaches to thermal management in advanced fiber lasers and amplifiers
Material approaches to thermal management in advanced fiber lasers and amplifiers Open
For as long as light and matter have partnered, impurities have played a role in optical system performance. This remains generally true for photonic heat engines and especially the case for optical refrigeration. Building on the history o…
View article: Continuous optical detection of small-molecule analytes in complex biomatrices
Continuous optical detection of small-molecule analytes in complex biomatrices Open
Current technology for measuring specific biomarkers – continuously in complex samples, without sample preparation – is limited to just handful of molecules such as glucose and blood oxygen. In this work, we present the first optical biose…
View article: Nonlinear optical coupler using a doped optical waveguide
Nonlinear optical coupler using a doped optical waveguide Open
An optical mode coupling apparatus includes an Erbium-doped optical waveguide in which an optical signal at a signal wavelength propagates in a first spatial propagation mode and a second spatial propagation mode of the waveguide. The opti…
View article: Stable nonlinear Mach-Zehnder fiber switch
Stable nonlinear Mach-Zehnder fiber switch Open
An all-optical fiber switch is implemented within a short Mach-Zehnder interferometer configuration. The Mach-Zehnder switch is constructed to have a high temperature stability so as to minimize temperature gradients and other thermal effe…
View article: Analytic Method for Estimating Aircraft Fix Displacement from Gyroscope's Allan-Deviation Parameters
Analytic Method for Estimating Aircraft Fix Displacement from Gyroscope's Allan-Deviation Parameters Open
The noise and drift requirements for a navigation-grade gyroscope are widely known, yet there is no simple analytic model of how the noise and drift of a gyroscope influence the fix displacement error (FDE) of an inertial navigation system…
View article: Quasi-CW Pumping of a Single-Frequency Fiber Amplifier for Efficient SHG in PPLN Crystals with Reduced Thermal Load
Quasi-CW Pumping of a Single-Frequency Fiber Amplifier for Efficient SHG in PPLN Crystals with Reduced Thermal Load Open
Single-frequency lasers are essential for high-resolution spectroscopy and sensing applications as they combine high-frequency stability with low noise and high output power stability. For many of these applications, there is increasing in…
View article: Compact Single-Frequency MOPA Using a Silica Fiber Highly Doped with Yb3+
Compact Single-Frequency MOPA Using a Silica Fiber Highly Doped with Yb3+ Open
We report on a single-frequency fiber master oscillator power amplifier utilizing a polarization-maintaining step-index fiber with an Al/Ce/F core-glass composition doped with a very high Yb concentration (0.25 at.%). This design made it p…
View article: Radiation-Balanced Silica Fiber Amplifier
Radiation-Balanced Silica Fiber Amplifier Open
We report what we believe to be the first radiation-balanced fiber amplifier-a device that provides optical gain while experiencing no temperature rise. The gain medium is a silica fiber with a 21-μm-diameter core highly doped with Yb^{3+}…
View article: Radiation-balanced silica fiber laser
Radiation-balanced silica fiber laser Open
In optically pumped lasers, heat generated by the quantum defect causes detrimental fluctuations in the output mode, frequency, and power. Common heat-mitigation techniques use bulky mechanical coolers that introduce vibrations, leading to…