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Research Output

1980

A simple and efficient optically pumped NH3 laser system

Harrison, R. G., Gupta, P. K., Kar, A. K. & Taghizadeh, M. R., 1980, In : Optical Communication. 34, 3, p. 445-446 2 p.

Research output: Contribution to journalArticle

1981

12.8-μm NH3 laser emission with 40-60% power conversion and up to 28% energy conversion efficiency

Gupta, P. K., Kar, A. K., Taghizadeh, M. R. & Harrison, R. G., 1981, In : Applied Physics Letters. 39, 1, p. 32-34 3 p.

Research output: Contribution to journalArticle

1982

Anomalous Polarization Coupling in Tea Co2-Lasers

Kar, A. K., Harrison, R. G., Emshary, C. A., Tratt, D. & Smith, D., 1982, In : Applied Physics B: Photophysics and Laser Chemistry. 29, 3, p. 145-146 2 p.

Research output: Contribution to journalArticle

Efficient Multikilowatt Mid Infrared Difference Frequency Generation in Cdgeas2

Harrison, R. G., Gupta, P. K., Taghizadeh, M. R. & Kar, A. K., 1982, In : IEEE Journal of Quantum Electronics. 18, p. 1239-1242 4 p.

Research output: Contribution to journalArticle

Injection-locking of TEA CO2 lasers by an orthogonally-polarised injection source

Kar, A. K., Tratt, D. & Harrison, R. G., 15 Oct 1982, In : Optics Communications. 43, 4, p. 274-276 3 p.

Research output: Contribution to journalArticle

Line-tunable orthogonally polarised dual-wavelength operation of a CW CO2 laser

Tratt, D., Kar, A. K. & Harrison, R. G., 1982, In : Journal of Physics E: Scientific Instruments. 15, 10, p. 1010-1011 2 p., 012.

Research output: Contribution to journalArticle

New lasers and laser schemes

Behn, R., Dupertuis, M. A., Kjelberg, I., Morgan, P. D., Okada, T., Siegrist, M. R., Couillaud, B., Ducasse, A., Freysz, E., Sarger, L., Xiong, L. Y., Fischer, E., Rozkwitalski, Z. N., Kneubühl, F. K., Helman, J. S., Rau, C., Bunge, C. F., Kar, A. K., Harrison, R. G., Emshary, C. A. & 14 others, Tratt, D., Smith, D., Marowsky, G., Albers, E., Hohla, K., Silfvast, W. T., Wood, O. R., Macklin, J. J., Stephan-Rossbach, K. H., Comes, F. J., Tittel, F. K., Sauerbrey, R., Walter, W. & Wilson, W. L., Nov 1982, In : Applied Physics B: Photophysics and Laser Chemistry. 29, 3, p. 143-148 6 p.

Research output: Contribution to journalArticle

New lasers II

Moulton, P. F., Künzel, W., Dürr, U., Beimowski, A., Huber, G., Pruss, D., Laptev, V. V., Shcherbakov, I. A., Zharikov, Y. V., Struve, B., Eggleston, J. M., Kane, T., Byer, R. L., Unternahrer, J., Harrison, R. G., Taghizadeh, M. R., Kar, A. K., Gupta, P. K., Jackson, D. J., Wynne, J. J. & 4 others, Rocca, J. J., Meyer, J. D., Yu, Z. Q. & Collins, G. J., Jun 1982, In : Applied Physics B: Photophysics and Laser Chemistry. 28, 2-3, p. 233-239 7 p.

Research output: Contribution to journalArticle

1983

Analysis of multiple photon excitation and carbon isotope separation of CF3I

Taghizadeh, M. R., Kar, A. K., Harrison, R. G. & Gupta, P. K., 1983, Quantum Electronics and Electro-Optics; Proceedings of the Fifth National Quantum Electronics Conference, held in September, 1981, in Hull, UK. Wiley, 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Anomalous polarisation coupling in TEA CO2 lasers

Harrison, R. G., Kar, A. K., Tratt, D., Emshary, C. A. & Smith, D., 1983, Proceedings of the International Conference on Lasers '82. p. 632-635 4 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Injection Locking of Wide-Aperture Tea Co2-Lasers

Tratt, D., Kar, A. K., Mathew, J. G. H. & Harrison, R. G., 1983, In : Applied Optics. 22, p. 208-209 2 p.

Research output: Contribution to journalArticle

Optical bistability in InSb at room temperature with two-photon excitation

Kar, A. K., Mathew, J. G. H., Smith, S. D., Davis, B. & Prettl, W., 1983, In : Applied Physics Letters. 42, 4, p. 334-336 3 p.

Research output: Contribution to journalArticle

Polarization coupling effects in transversely excited atmospheric CO 2 lasers: Application to single axial mode operation

Kar, A. K., Harrison, R. G., Tratt, D. & Emshary, C. A., 1983, In : Applied Physics Letters. 42, 1, p. 12-14 3 p.

Research output: Contribution to journalArticle

1985

2 PHOTON INDUCED OPTICAL BISTABILITY IN CDHGTE AT ROOM-TEMPERATURE

CRAIG, D., KAR, A. K., MATHEW, J. G. H. & MILLER, A., 1985, In : IEEE Journal of Quantum Electronics. 21, 9, p. 1363-1369 7 p.

Research output: Contribution to journalArticle

FAST OPTICAL SWITCHING AND BISTABILITY IN ROOM-TEMPERATURE CDHGTE AT 10.6 MU-M

CRAIG, D., MILLER, A., MATHEW, J. G. H. & KAR, A. K., 1985, In : Infrared Physics. 25, 1-2, p. 289-294 6 p.

Research output: Contribution to journalArticle

Fast optical switching and bistability in room temperature CdHgTe at 10.6 μm

Craig, D., Miller, A., Mathew, J. G. H. & Kar, A. K., Feb 1985, In : Infrared Physics. 25, 1-2, p. 289-294 6 p.

Research output: Contribution to journalArticle

INJECTION-LOCKED SINGLE MODE TEA CO//2 LASERS: SOME RECENT MEASUREMENTS AND INNOVATIONS.

Tratt, D., Kar, A. K. & Harrison, R. G., 1985, NATO ASI Series, Series B: Physics. Vol. 132. p. 343-353 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

OPTIMIZATION OF OPTICALLY BISTABLE INTERFERENCE FILTERS FOR ARRAY PROCESSING.

Wherrett, B. S., Kar, A. K., Hutchings, D., Russell, D. & Clement, H., Apr 1985, In : Optica Acta. 33, 4, p. 517-526 10 p.

Research output: Contribution to journalArticle

Spectral control of gain-switched lasers by injection-seeding: Application to TEA CO2 systems

Tratt, D., Kar, A. K. & Harrison, R. G., 1985, In : Progress in Quantum Electronics. 10, 4, p. 229-265 37 p.

Research output: Contribution to journalLiterature review

Status and prospects of hybrid and injection-locked TEA CO2lasers for LIDAR and nonlinear optics applications

Kar, A. K., Tratt, D., Matthew, J., Heckenberg, N. R. & Harrison, R. G., Apr 1985, In : IEEE Journal of Quantum Electronics. 21, 4, p. 359-364 6 p.

Research output: Contribution to journalArticle

THEORETICAL AND EXPERIMENTAL STUDY OF THE INJECTION-LOCKED TEA CO//2 LASER INCORPORATING ELECTRON-PLASMA PREPULSE CHIRP PHENOMENA.

Kar, A. K., Tratt, D., Heckenberg, N. R. & Harrison, R. G., Jan 1985, In : IEEE Journal of Quantum Electronics. QE-21, 1, p. 11-14 4 p.

Research output: Contribution to journalArticle

TIME RESOLVED SELF-DEFOCUSING IN InSb AT ROOM TEMPERATURE.

Mathew, J. G. H., Kar, A. K., Heckenberg, N. R. & Galbraith, I., Jan 1985, In : IEEE Journal of Quantum Electronics. QE-21, 1, p. 94-99 6 p.

Research output: Contribution to journalArticle

1986

All-optical power limiting of CO2 laser pulses using cascaded optical bistable elements

Walker, A. C., Kar, A. K., Ji, W., Keller, U. & Smith, S. D., 1986, In : Applied Physics Letters. 48, 11, p. 683-685 3 p.

Research output: Contribution to journalArticle

Operationnal characteristics of injection-locked TEA CO2 lasers

Tratt, D., Kar, A. K., Harrison, R. G. & Heckenberg, N. R., 1986, Proceedings of the International Conference on Lasers '85, Las Vegas, Nevada, December 2-6, 1985. STS Press, 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Optical switching in PbSnSe at low temperature

Grisar, R., Ball, D., Preier, H. M. & Kar, A. K., 15 Feb 1986, In : Optics Communications. 57, 2, p. 121-124 4 p.

Research output: Contribution to journalArticle

QUASI-CW OPTICAL BISTABILITY IN InSb AT ROOM TEMPERATURE.

Ji, W., Kar, A. K., Mathew, J. G. H. & Walker, A. C., Feb 1986, In : IEEE Journal of Quantum Electronics. QE-22, 3, p. 369-375 7 p.

Research output: Contribution to journalArticle

1987

Dispersive optical bistability in a PbSnSe etalon at room temperature

Reid, J. J. E., Kar, A. K., MacKenzie, H. A., Grisar, R. & Preier, H. M., 15 Oct 1987, In : Optics Communications. 64, 2, p. 175-180 6 p.

Research output: Contribution to journalArticle

DYNAMIC BEHAVIOR AND RESPONSE-TIME CONTROL OF TWO-PHOTON OPTICAL BISTABILITY IN INSB AT 10. 6 mu M WAVELENGTH.

Ji, W., Kar, A. K., Chua, P. L. & Walker, A. C., Nov 1987, In : IEEE Journal of Quantum Electronics. QE-23, 11, p. 1986-1991 6 p.

Research output: Contribution to journalArticle

Fast optical switching and optical bistability in a PbSnSe étalon

Reid, J. J. E., Kar, A. K., MacKenzie, H. A., Chua, P. L., Grisar, R. & Preier, H. M., 1987, In : Applied Physics Letters. 51, 16, p. 1215-1217 3 p.

Research output: Contribution to journalArticle

1988

Nonlinear refractive-index cross section for InSu at 10.6-μm wavelength.

Chua, P. L., Ji, W., Kar, A. K. & Walker, A. C., 1988, CLEO 88 Conf Lasers Electro Opt 1988 Tech Dig Ser Vol 7. p. 26, 27

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Single-pixel bistability with nonlinear interference filters

Abraham, E., Kar, A. K., Suttie, M. R., Harris, R. M., Walker, A. C. & Smith, S. D., 1988, In : Journal of Applied Physics. 64, 7, p. 3393-3397 5 p.

Research output: Contribution to journalArticle

1989

Elliptical defocusing in organic nonlinear optical materials

Wherrett, B. S., Kar, A. K., Ji, W., Harvey, T., Bloor, D., Ando, D. J. & Norman, P. A., 1989, CONFERENCE ON LASERS AND ELECTRO-0PTICS. p. 212-

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Temporal pump depletion and self-defocusing of electronic origin in ZnSe at room temperature

Ji, W., Milward, J. R., Kar, A. K., Wherrett, B. S. & Pidgeon, C. R., 1989, CONFERENCE ON LASERS AND ELECTRO-0PTICS. p. 284-286 3 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1991

Electronic self-defocusing of nanosecond laser pulses in bulk ZnSe

Milward, J. R., Ji, W., Kar, A. K., Pidgeon, C. R. & Wherrett, B. S., 1991, In : Journal of Applied Physics. 69, 10, p. 7351-7353 3 p.

Research output: Contribution to journalArticle

Photogenerated carrier recombination time in bulk ZnSe

Milward, J. R., Ji, W., Kar, A. K., Pidgeon, C. R. & Wherrett, B. S., 1991, In : Journal of Applied Physics. 69, 4, p. 2708-2710 3 p.

Research output: Contribution to journalArticle

1992

Refractive optical nonlinearities in a thin film ZnSe interference filter

Bolger, J., Kar, A. K. & Wherrett, B. S., Apr 1992, In : Optical Materials. 1, 2, p. 71-74 4 p.

Research output: Contribution to journalArticle

1993

Band-edge refractive optical nonlinearities in molecular beam-grown ZnSe epilayers

Bolger, J. A., Galbraith, I., Kar, A. K., Simpson, J., Wang, S. Y., Prior, K. A., Cavenett, B. C. & Wherrett, B. S., 1993, In : Applied Physics Letters. 63, 6, p. 709-711 3 p.

Research output: Contribution to journalArticle

Carrier dynamics and emission-line narrowing in n- and p-type molecular-beam grown ZnSe epilayers

Bolger, J. A., Kar, A. K., Wherrett, B. S., Prior, K. A., Simpson, J., Wang, S. Y. & Cavenett, B. C., 1993, In : Applied Physics Letters. 63, 5, p. 571-573 3 p.

Research output: Contribution to journalArticle

Infrared FEL measurements of power limiting by two-photon absorption in InSb and optical pulse length measurements

Jaroszynski, D. A., Ortega, J. M., Prazeres, R., Glotin, F., Murdin, B. N., Merveille, C., Kar, A. K., Kimmitt, M. F. & Pidgeon, C. R., 1 Jul 1993, In : Nuclear Inst. and Methods in Physics Research, A. 331, 1-3, p. 640-644 5 p.

Research output: Contribution to journalArticle

Infrared free-electron laser measurement of power limiting by two-photon absorption in InSb

Murdin, B. N., Merveille, C., Kar, A. K., Pidgeon, C. R., Jaroszynski, D. A., Ortega, J. M., Prazeres, R. & Glotin, F., Mar 1993, In : Optical and Quantum Electronics. 25, 3, p. 171-175 5 p.

Research output: Contribution to journalArticle

Infrared free electron laser measurement of two-photon absorption in InAs and InSb over a wide spectral range

Murdin, B. N., Pidgeon, C. R., Kar, A. K., Jaroszynski, D. A., Ortega, J. M., Prazeres, R., Glotin, F. & Hutchings, D. C., Apr 1993, In : Optical Materials. 2, 2, p. 89-93 5 p.

Research output: Contribution to journalArticle

Nondegenerate two-photon absorption spectra of ZnSe, ZnS and ZnO

Bolger, J. A., Kar, A. K., Wherrett, B. S., DeSalvo, R., Hutchings, D. C. & Hagan, D. J., 15 Mar 1993, In : Optics Communications. 97, 3-4, p. 203-209 7 p.

Research output: Contribution to journalArticle

Nonlinear optical properties of silver-doped As2S3

Kosa, T. I., Rangel-Rojo, R., Hajto, E., Ewen, P. J. S., Owen, A. E., Kar, A. K. & Wherrett, B. S., 2 Dec 1993, In : Journal of Non-Crystalline Solids. 164-166, PART 2, p. 1219-1222 4 p.

Research output: Contribution to journalArticle

1994

Excite-probe FEL (CLIO) study of two-photon-induced carrier dynamics in narrow gap semiconductors

Murdin, B. N., Rangel-Rojo, R., Pidgeon, C. R., Kimmitt, M. F., Kar, A. K., Jaroszynski, D. A., Ortega, J. M., Prazeres, R., Glotin, F. & Hutchings, D. C., 1 Mar 1994, In : Nuclear Inst. and Methods in Physics Research, A. 341, 1-3, p. 165-168 4 p.

Research output: Contribution to journalArticle

Near-infrared optical nonlinearities in amorphous chalcogenides

Rangel-Rojo, R., Kosa, T., Hajto, E., Ewen, P. J. S., Owen, A. E., Kar, A. K. & Wherrett, B. S., 15 Jun 1994, In : Optics Communications. 109, 1-2, p. 145-150 6 p.

Research output: Contribution to journalArticle

Optical nonlinearities in polymeric materials

Kar, A. K., 6 Apr 1994, In : IEE Colloquium (Digest). 84

Research output: Contribution to journalArticle

Picosecond-continuum measurements of ultrafast dynamic refractive nonlinearities in a ZnSe interference filter

Bolger, J. A., Kar, A. K., Meredith, P. & Wherrett, B. S., 15 Sep 1994, In : Optics Communications. 111, 1-2, p. 111-115 5 p.

Research output: Contribution to journalArticle

Stimulated and spontaneous emission in ZnSe lasing structures

Blewett, I. J., Gallaher, N. R., Smith, E. C., Wang, S. Y., Galbraith, I., Kar, A. K. & Wherrett, B. S., 1994, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting. Vol. 8. p. 203-204 2 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1996

Nanosecond excitation dynamics of long M-state lifetime, bacteriorhodopsin

Bacon, M., Wang, C. H., Kar, A. K., Baxter, R. L. & Wherrett, B. S., 1996, In : Optics Communications. 124, p. 175-183 9 p.

Research output: Contribution to journalArticle

Nanosecond optical excitation dynamics of long M-state lifetime bacteriorhodopsin films

Bacon, M., Wang, C. H., Kar, A. K., Baxter, R. L. & Wherrett, B. S., 15 Feb 1996, In : Optics Communications. 124, 1-2, p. 175-183 9 p.

Research output: Contribution to journalArticle