Stabilizing a laser beam’s focal point inside a liquid‐helium cryostat

The focal point of a laser beam inside a liquid‐helium cryostat has been spatially stabilized. Both passive and active stabilization techniques are employed. The position of the focal point is maintained to submicrometer dimensions in the plane transverse to the beam path. The instabilities along th...

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Veröffentlicht in:	Review of scientific instruments 1993-02, Vol.64 (2), p.325-330
Hauptverfasser:	Jaffe, S. M., Yen, W. M., Grill, W.
Format:	Artikel
Sprache:	eng
Schlagworte:	426002 - Engineering- Lasers & Masers- (1990-) Beam characteristics: profile, intensity, and power spatial pattern formation BEAM OPTICS CONTROL EQUIPMENT Cryogenics CRYOSTATS Dewars ELECTROMAGNETIC RADIATION ENGINEERING Exact sciences and technology FOCUSING Fundamental areas of phenomenology (including applications) Laser optical systems: design and operation LASER RADIATION LASERS Liquid lasers Optics Physics RADIATIONS SOLID STATE LASERS STABILIZATION THERMOSTATS
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Beschreibung
Zusammenfassung:	The focal point of a laser beam inside a liquid‐helium cryostat has been spatially stabilized. Both passive and active stabilization techniques are employed. The position of the focal point is maintained to submicrometer dimensions in the plane transverse to the beam path. The instabilities along the beam propagation direction are reduced to the order of 10 μm.
ISSN:	0034-6748 1089-7623
DOI:	10.1063/1.1144456