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US3881115A Expired / Lapsed US ⏱️ 0.0 years remaining

Multiple quantum laser

Assignee: International Business Machines Corp
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Filing: 1973-12-28
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Granted: 1975-04-29
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Expires: 1993-12-28
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Abstract

Abstract A double quantum laser employing volatile monoiodides as the active medium and using a combination of stimulated Raman emission and four wave parametric conversion to generate two pulses suitable for triggering the double quantum amplification process.

Inventors

  • 👤 Rodney Trevor Hodgson
  • 👤 John Robert Lankard
  • 👤 Peter Pitirinovich Sorokin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 00:59
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/23; H01S3/2308; H01S3/2316; G; G02; G02F; G02F1/00; G02F1/35; G02F1/353; G02F1/3534; H01S3/09; H01S3/095; H01S3/30; H01S3/305

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 64 words
A system for generating stimulated two photon emission comprising volatile monoiodides in a transparent container, flash photolysis means directed at said volatile monoiodides for achieving large inversions in atomic iodine to an excited state, and means for generating two intense synchronous pulses Nu 1 and Nu 2 such that h Nu 1 and h Nu 2 equals the energy of the excited iodine atoms.
Claim 2
Independent Claim 64 words
A system for generating stimulated two photon emission comprising volatile monoiodides in a transparent container, flash photolysis means directed at said volatile monoiodides for achieving large inversions in atomic iodine to an excited state, and means for generating two intense synchronous pulses Nu 1 and Nu 2 such that h Nu 1 and h Nu 2 equals the energy of the excited iodine atoms.
Claim 3
Independent Claim 117 words
A system for generating stimulated two photon emission comprising atomic iodine in a transparent container, an intense laser pulse of first frequency Nu L directed at said atomic iodine to achieve by stimulated Raman scattering a second frequency Nu S appearing with said first frequency Nu L, a second transparent container of atomic iodine excited by said frequencies Nu S and Nu L so as to produce by four wave parametric conversion a third frequency Nu R of light whereby Nu R Nu L-2 Nu S, means for filtering out Nu L but transmitting Nu S and Nu R, and means for amplifying said frequencies Nu S and Nu R comprising flash photolysis of a volatile monoiodide.
Claim 4
Independent Claim 117 words
A system for generating stimulated two photon emission comprising atomic iodine in a transparent container, an intense laser pulse of first frequency Nu L directed at said atomic iodine to achieve by stimulated Raman scattering a second frequency Nu S appearing with said first frequency Nu L, a second transparent container of atomic iodine excited by said frequencies Nu S and Nu L so as to produce by four wave parametric conversion a third frequency Nu R of light whereby Nu R Nu L-2 Nu S, means for filtering out Nu L but transmitting Nu S and Nu R, and means for amplifying said frequencies Nu S and Nu R comprising flash photolysis of a volatile monoiodide.
Claim 5
Independent Claim 207 words
A system for achieving two stimulated emission pulses due to a double quantum transition comprising a laser emitting an intense beam at a frequency Nu L, iodine vapor in a cell that is excited by said beam of frequency Nu L, means for dissociating most molecules of said iodine vapor into iodine atoms while said vapor is excited by said laser beam so as to produce a Stokes frequency Nu S equal to the frequency Nu L minus the frequency of the excited state of said iodine atoms, a second cell in the path of said two frequencies Nu L and Nu S and containing iodine molecules each of which has been dissociated into two iodine atoms, the interaction of said two frequencies with said iodine atoms producing a third frequency Nu R such that Nu R Nu L - 2 Nu S, which frequencies appear simultaneously as outputs from said second cell, means for filtering out the frequency Nu L so that only the frequencies Nu S and Nu R remain, and a third cell containing excited iodine atoms in the path of said two frequencies Nu S and Nu R so as to produce amplified output signals corresponding to frequencies Nu S and Nu R.
Claim 6
Independent Claim 207 words
A system for achieving two stimulated emission pulses due to a double quantum transition comprising a laser emitting an intense beam at a frequency Nu L, iodine vapor in a cell that is excited by said beam of frequency Nu L, means for dissociating most molecules of said iodine vapor into iodine atoms while said vapor is excited by said laser beam so as to produce a Stokes frequency Nu S equal to the frequency Nu L minus the frequency of the excited state of said iodine atoms, a second cell in the path of said two frequencies Nu L and Nu S and containing iodine molecules each of which has been dissociated into two iodine atoms, the interaction of said two frequencies with said iodine atoms producing a third frequency Nu R such that Nu R Nu L - 2 Nu S, which frequencies appear simultaneously as outputs from said second cell, means for filtering out the frequency Nu L so that only the frequencies Nu S and Nu R remain, and a third cell containing excited iodine atoms in the path of said two frequencies Nu S and Nu R so as to produce amplified output signals corresponding to frequencies Nu S and Nu R.
Claim 7
Dependent Claim 12 words
The system of claim 3 wherein said laser is a ruby laser.
Claim 8
Dependent Claim 13 words
The system of claim 3 wherein said laser is a neodymium glass laser.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-04-28 1978-10-28 1979-04-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-04-28 1982-10-28 1983-04-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-04-28 1986-10-28 1987-04-29 $7700.00 Window Closed / Lapsed

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