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Browse Prior Art Database

Radio-Frequency Gating of Spectral Holeburning

IP.com Disclosure Number: IPCOM000116205D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Macfarlane, RM: AUTHOR [+2]

Abstract

Disclosed is a method of gating the spectral holeburning process for information storage using an applied radio-frequency field. This produces long-lived holes to store information in a time or frequency domain memory as stimulated photon echoes or spectral holes. The gating process "fixes" the spectral holes so that the information contained in them can be read nondestructively.

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Radio-Frequency Gating of Spectral Holeburning

      Disclosed is a method of gating the spectral holeburning
process for information storage using an applied radio-frequency
field.  This produces long-lived holes to store information in a time
or frequency domain memory as stimulated photon echoes or spectral
holes.  The gating process "fixes" the spectral holes so that the
information contained in them can be read nondestructively.

      In a frequency domain or time domain optical information
storage process, data is encoded in a material system as a series of
spectral holes (i.e., frequencies at which the transmission of the
material is changed).  In the frequency domain (1), writing is
carried out by irradiating the material at a series of frequencies
corresponding to data bits and in the time domain (2)  by irradiating
with a string of data pulses which creates a complex hole pattern.
The reading process is similar:  for the frequency domain, the
transmission of the material is probed; and in the time domain, a
strong pulse is applied which produces a pulse train image of the
input data.  In both cases, the reading process tends to erase the
written information because the physical process for reading and
writing is the same.

      The aim of gating processes (3) is to enable the writing
process only in the presence of a gating field and to remove the
gating field during reading so that erasure does not occur.  Here is
proposed a new method of gat...