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Wavelength Conversion: PPLN waveguide wavelength-conversion efficiency improves by a factor of 20

John Wallace, Senior Editor, LaserFocusWorld

Last modified Tue, 29 Jan, 2019 at 13:11

LIGO Gravitational Wave Researchers to Divide $3 Million

From the New York Times


It was a good day for Einstein when an international collaboration of physicists announced in February that they detected ripples in space time known as gravitational waves from the collision of two gigantic black holes far far away. Neither gravitational waves nor black holes — both predictions of Einstein’s theory of gravity, general relativity — had been seen directly before.

Last modified Thu, 5 May, 2016 at 9:22

Prof. Martin M. Fejer elected to National Academy of Sciences

The National Academy of Sciences announced today (5/3/2016) the election of 84 new members and 21 foreign associates from 14 countries in recognition of their distinguished and continuing achievements in original research.

Those elected today bring the total number of active members to 2,291 and the total number of foreign associates to 465. Foreign associates are nonvoting members of the Academy, with citizenship outside the United States.

Last modified Wed, 4 May, 2016 at 14:11

Stanford physicists set quantum record by using photons to carry messages from electrons 1.2 miles apart

By using photons to communicate between two electrons through more than a mile of fiber optic cable, physicists have taken an important step toward proving the practicality of quantum networks.

Last modified Tue, 24 Nov, 2015 at 16:36

Viewpoint: Two Photons into One

Quantum information science opens new opportunities for future information-processing architectures that exploit the fundamental properties of quantum mechanics. Quantum information processing (QIP) has two essential ingredients: elementary quantum logic gates and remote communication of quantum information.

Last modified Thu, 23 Oct, 2014 at 10:55

Spotlight on Optics | Highlighted Articles from OSA Journals

Spotlight summary: The concept of quasi-phase-matching (QPM) was introduced at the very beginning of the era of lasers and nonlinear optics as a generic method to increase the efficiency of second order nonlinear interactions. However, it was not until the early 90’s, with the introduction of periodically poled ferroelectrics obtained by electric field poling that the technique began to blossom as an engineering tool to tailor nonlinear interactions.

Last modified Wed, 3 Apr, 2013 at 9:23

Stanford Report covers our recent demonstration of quantum-dot spin-photon entanglement using frequency downconversion

From the Stanford News service:

"Stanford researchers demonstrate the first step in a scalable quantum cryptography system that could lead to uncrackable telecommunications."

Link to article.

Last modified Thu, 15 Nov, 2012 at 19:02

Laser Focus World coverage of single-photon detection via upconversion in PPLN waveguides

By John Wallace
Senior Editor

Long-wavelength pumped, periodically poled lithium niobate waveguides upconvert single photons, allowing efficient, low-noise silicon avalanche photodiodes to detect the signal.

Link to article

Last modified Fri, 25 May, 2012 at 11:23