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High Power Single Mode Single Frequency Visible Fibre Laser

High Power Single Mode Visible Fibre Laser

ALS-VISIBLE series is a range of high power, high brightness single frequency lasers employing MOPA technology in the visible.

Description

The high power visible single mode fibre laser series from our partner Azur Light Systems include the 488nm515nm and 532nm lasers. These are continuous wave industrial-grade lasers with excellent stability which use Yb3+ fibre based laser technology. Their smart design using Master Oscillator Power Amplifier (MOPA) architecture gives the freedom for us to tailor the product to your application.

General Key Features:

  • Ultra-low noise – intensity noise < 0.05% RMS
  • Single Frequency – linewidth is less than 50 kHz with option to reduce down to 3 kHz and tunable linewidth option available
  • Best-in-class Pointing stability – less than ± 0.5 µrad/°C
  • Single Mode – diffraction limited M² < 1.1, circularity > 95%, strictly single mode fiber
  • Maintenance free – long life
  • Long term power stability with centre wavelength drift – less than ± 0.5% over 8 hours
  • Internal seeder, *external seeder and stand-alone amplifier options available
  • Passive laser heads or output fibres with collimated beams are available – the passive heads doesn’t generate heat and doesn’t need any active cooling systems
  • Various output power options available depending on laser model

*The Azurlight seeder is housed in an external rack. This allows future upgrades such as adding power splitters to drive multiple amplifiers in parallel or upgrade or change of seed laser

If you have a custom requirement for an infrared single mode, single frequency, fibre laser or amplifier which isn’t covered by the standard models, get in touch here.

Atom cooling / trapping and quantum optics

Simplified principle of Doppler laser cooling:

(1) A stationary atom sees the laser neither red- nor blue-shifted and does not absorb the photon.

(2) An atom moving away from the laser sees it red-shifted and does not absorb the photon.

(3.1) An atom moving towards the laser sees it blue-shifted and absorbs the photon, slowing the atom.

(3.2) The photon excites the atom, moving an electron to a higher quantum state.

3.3) The atom re-emits a photon. As its direction is random, there is no net change in momentum over many atoms.

Azur Light Systems offers also preamplified tunable seeders (thermal & piezo locked) to seed multiple optical amplifiers to generate multiple mutually coherent laser beams.

Quantum optics / Interferometry:

High precision interferometry and fundamental quantum optics now enable the study of previously unobserved phenomena such as gravitational waves. The observation of these effects is only possible with an ultra-stable low noise laser. Parameters of interest are low noise level, spectral width and stability.

ALS technological advantages

Thanks to the MOPA configuration, it is possible to choose a particular wavelength or a tunable seeder to match the atom rays of interest.
ALS-IR lasers benefit from one the best frequency stabilities on the market (< 50 MHz over 8h).
The fiber laser technology and the cooler-less laser head allows an excellent pointing and spatial mode stability. It also avoid any vibration of the experimental table which is essential.
Power stability is also really important because a change in power will affect the efficiency of the atom trap.
Noise level matter for atom cooling/trapping application as well as for interferometry application. That is why most users choose our single frequency version to benefit of its ultra-low noise level even if they don’t always need a single frequency linewidth.

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