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Parametric Generation of 823 cm/-1/ Radiation in NH(3)

IP.com Disclosure Number: IPCOM000089417D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Grischkowsky, DR: AUTHOR [+2]

Abstract

823 cm/-1/ radiation is generated for laser isotope separation through resonantly enhanced four-wave parametric generation using a particular set of levels in NH(3) and particular lines of a CO(2) laser.

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Parametric Generation of 823 cm/-1/ Radiation in NH(3)

823 cm/-1/ radiation is generated for laser isotope separation through resonantly enhanced four-wave parametric generation using a particular set of levels in NH(3) and particular lines of a CO(2) laser.

The NH(3) levels used are the Nu(2) band (v/+/=/(2), j, K) = (0/-/, 5, 4), (1/+/, 5, 4), (2/-/, 5, 4) and (1/+/, C, 4). The CO(2) laser lines used are the 10 Mu band P34 and P18 lines and the 9 Nu band P12 line. The frequency of light thus generated is: Nu(P34) + Nu(P18) - Nu(P12) = 823.058 cm/-1/ which compares very favorably with one of the few frequencies needed for laser isotope separation, namely 823 cm/-1/ +/- 1 cm/-1/. The nonlinear susceptibility due to resonant enhancement is: X/3/(Omega(1) + Omega(2) - Omega(3)) = P(1) P(2) P(3) P(4) over h/3/ Delta(1) Delta(2) Delta(3) = 0.34 x 10/-26/ e.s.u. where p is the dipole moment and Delta is the frequency offset.

Assuming perfect phase matching, which can be achieved by adding buffer gas, an output power of 10 MW/cm/2/ can be achieved with input laser intensities of 100 MW/cm/2/. The output light frequency could also be made tunable within the +/- 1 cm/-1/ range by making Epsilon(3) tunable (for example, from a high- pressure CO(2) laser at 15 atm.).

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