Atomic Trapping and Cooling

Laser cooling and trapping is the ability to cool atoms down to unprecedented kinetic temperatures, and to confine and support isolated atoms in “atom traps”. This unique new level of control of atomic motion allows researchers to study the behavior of atoms and quantum mechanical properties.
Different atomic cooling techniques exist, e.g. Doppler cooling, Sub–Doppler technique (used when the Doppler limit is reached – natural linewidth of the atomic transition), and atom evaporation in a Bose-Einstein condensate to slow the atom further.
Typical applications include time/frequency standards (atomic clocks), GPS systems and navigation, research on fundamental constants, quantum information (computing and encryption), and atom interferometry (gravitational detection of natural resources, potentially oil & gas).

For resonant laser cooling a very precise wavelength is required to match a specific atomic/ion transition, making DFB fiber lasers ideal. Often, lasers with a linewidth narrower than the atomic transition are required.

What can NKT Photonics offer for trapping and cooling applications?

Koheras lasers offer ultra low noise, narrow linewidth and high frequency stability in a rugged fiber format. For trapping and cooling applications, we recommend our Koheras BOOSTIK single frequency lasers. The BOOSTIK system has a range of advantages that has made it a daily driver in hundredes of laboratories around the World:

Koheras_BoostiK

  • Easy to use and maintenance free

  • High frequency stability

  • Ultra low phase noise

  • High power

  • Excellent beam quality

The BOOSTIK laser system comes in many different wavelength ranges and power levels to suit the many different needs within atomic physics

Model

Wavelength*

Output power

PM

Piezo tuning

Y10

1030-1090 nm

2,  5, 10 or 15W

Optional

Yes

E15

1530-1575 nm

2, 5 or 10W

Optional

Yes

C15

1530-1575 nm

2, 5 or 10W

Optional

Yes

Download datasheet on the Koheras_BOOSTIK datasheet

Wavelength freedom

One of the key advantages of our DFB fiber laser technology is the freedom to choose the operating wavelength and due to the excellent beam quality, frequency conversion can efficiently bring many important applications within atomic physics within reach of the BOOSTIK system. Frequency conversion examples are shown below.

Koheras-BOOSTIK-frequency-conversion

aeroGUIDE-POWER fiber delivery for high power narrow linewidth light

The aeroGUIDE-POWER is the gold standard of high power single-mode

fiber delivery and offers the highest nonlinear threshold of any PM single mode delivery system on the market.
The systems are equipped with high power SMA-905 connectors with built
in mode strippers to remove uncoupled light. The aeroGUIDE-POWER is single-mode and can guide light with low loss anywhere in the 500 to 2000 nm range.
The fiber is protected by an armored squarelock steel cable that can handle daily use and even inter-lab routing through walls.

Read here about how others have used Koheras lasers for atomic physics

Trapping and cooling

Barium

Beryllium

Magnesium

Rubidium

Strontium

Ytterbium

General

Spectroscopy

Frequency conversion

Other

 

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