Markus Krutzik

Group Leader, Optical Metrology Group at Humboldt-Universität zu Berlin

Markus Krutzik is a group leader of the Optical Metrology Group at Humboldt-Universität zu Berlin (Berlin, Germany).

FIGURE 1. A palm-sized box houses a rubidium-based optical frequency reference with a stability of 10-12 in one second.

Optical frequency reference within the palm of your hand

Oct. 19, 2022
A small vapor cell inside a tiny box with a diode laser can deliver what may be at the heart of many future satellites—an optical frequency reference with high stability and low...
FIGURE 1. Satellite based quantum communication: entangled photons are generated on-board the satellite and sent to two ground stations for secret key generation.
Fiber Optics

Long distance distribution of quantum keys

Feb. 7, 2022
Designing a globe-spanning network for quantum key distribution requires a different way of thinking. It is about space, entangled photons, and how to store them.
(Credit: NASA)
On May 24, 2018, the Northrop Grumman (formerly Orbital ATK) Cygnus spacecraft arrived at the International Space Station. The vehicle carried, among other things, NASA’s Cold Atom Laboratory.
Lasers & Sources

Laser systems enable quantum technology in space

Jan. 27, 2021
Qualifying a versatile ultracold atom experiment for the International Space Station requires many steps, with integrated laser systems playing a key role.