Transverse Non-Linear Optics


Keywords: optical information processing, lasers, optical pattern recognition

Start Date: 1 November 93 / Status: finished / Duration: 36 months

[ participants / contact]

Objectivies and Approach

The group is investigating patterns of optical phase defects of possible use to optical information processing in lasers and in particular methods to achieve structures of high complexity (high information content) with laser fields. A short term goal of the collaboration is to produce an experiment that can determine how many coexisting stable laser states can be realised (in a Na2 -laser as a demonstration system) based on rotation of an oriented field structure of the laser in the presence of boundaries of polygonal form.

Work will include :

European links: The work builds on ESPRIT Basic Research project TONICS (7118) and on Long Term Research project PASS (21112).

Progress and Results

The above mentioned work parts have been completed. Six different states have been recognised and very low switching energy limits have been found.

During the work, a theoretical suggestion arose out of the TONICS project that spatial solitons would permit a much larger information content (see "New Scientist", 16 March 1996, p. 22). The joint work is therefore continued into this direction and is associated with the project PASS.

Information Dissemination Activities and/or Exploitation

Results have been presented in many international conferences and published in scientific journals.


Physikalisch-Technische Bundesanstalt
Braunschweig und Berlin
Bundesallee 100
D - 38116 Braunschweig, D

EU Partners

Physikalisch-Technische Bundesanstalt, D
ADEN - Institut Non Lineaire de Nice, F

Non-EU Partners

University of Queensland, AUS


Prof. C.O. Weiss
Tel: +49 531 592 0
Fax: +49 531 592 92 92

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TONICS - EC-AUS001, May 1997

please address enquiries to the ESPRIT Information Desk

html version of synopsis by Nick Cook