Note: This list is a representative sample of recent publications discussing S2 and related technology. We are attempting to highlight all significant groups working in the field. However we realize this list is incomplete and welcome additions. Please e-mail us the PDF version of any article of interest and we will be happy to post it here.

S2 PROCESSING

W. R. Babbitt, J. A. Bell, Applied Optics Vol. 33 No. 8, 1538 (1994) "Coherent transient continuous optical processor"

W. R. Babbitt, K. D. Merkel, M. Tian, R. Krishna Mohan, Z. Cole, Y. Sun, and R. L. Cone, K. H. Wagner, R. W. Equall, Proceedings of GOMACTech Conference 2003, Tampa, FL, 293 (2003) "Optical-Coherent-Transient Technologies For Wide-Bandwidth and Multidimensional Analog Optical Signal Processing"

W. R. Babbitt, P. A. Roos, Z. Colea, R. R. Reibel, T. Berg, B. Kaylor, K. D. Merkel, K. H. Wagner, F. Schlottau, Y. Li, A. Hoskins, Proceedings of the 14th Coherent Laser Radar Conference, Snowmass, CO (2007) "High Resolution Range/Doppler Ladar Using Broadband Coherent Optical Processing"

Z. Cole, T. Bottger, R. Krishna Mohan, R. Reibel, W. R. Babbitt, R. L. Cone, K. D. Merkel, Applied Physics Letters Vol. 81 No. 19, 3525 (2002) "Coherent integration of 0.5 GHz spectral holograms at 1536 nm using dynamic biphase codes"

T. L. Harris, K. D. Merkel, R. K. Mohan, W. R. Babbitt, Presented at CLEO 2004, San Francisco, CA, (2004) "Range-Doppler Radar Signal Processing with Spectal Holography"

T.L. Harris, K. D. Merkel, R. K. Mohan, T. Chang, Z. Cole, A. Olson, and W. R. Babbitt, Applied Optics Vol. 45 No. 2, 343, (2006) "Multigigahertz range-Doppler correlative signal processing in optical memeory crystals"

T. L. Harris, Y. Sun, R. L. Cone, R. M. Macfarlane, R. W. Equall, Optics Letters Vol. 23 No. 8, 636 (1998) "Demonstration of real-time address header decoding for optical data routing at 1536 nm"

Y. Li, A. Hoskins, F. Schlottau, K. H. Wagner, C. Embry, W. R. Babbitt, Applied Optics Vol. 45 No. 25, 6409 (2006) "Ultrawideband coherent noise lidar range-Doppler imaging and signal processing by use of spatial-spectral holography in inhomogeneously broadened absorbers"

K. D. Merkel, W. R. Babbitt, Optical Letters Vol. 24 No. 3, 172 (1999) "Optical coherent transient continuously programmed continous processor"

K.D. Merkel, Z. Cole, W.R. Babbitt, Journal of Luminescence 86, 375 (2000) "Signal correlator with programmable variable time delay based on optical coherent transients"

K. D. Merkel, Z. Cole, R. K. Mohan, W. R. Babbitt, Proceedings of GOMACTech Conference 2003, Tampa, FL, 532 (2003) "Demonstration of the Spatial-Spectral Coherent Holographic Integrating Processor (S2-CHIP) for analog RF signal processing applications"

K. D. Merkel, R. K. Mohan, Z. Cole, T. Chang, A. Olson, W. R. Babbitt, Journal of Luminescence 107, 62 (2004) "Multi-Gigahertz radar range processing of baseband and RF carrier modulated signals in Tm:YAG"

K. D. Merkel, R. K. Mohan, Z. Cole, R. R. Reibel,T. L. Harris, T. Chang, W. R. Babbitt, Meeting on Microwave Photonics 2004, Oqunquit, ME, (2004) "Analog Optical Signal Processing of Baseband Codes in Tm:YAG up to 10 Gb/s"

R. R. Reibel, D. E. Benson, T. Berg, Z. Cole, K. D. Merkel, Meeting on Microwave Photonics 2005, Seoul, Korea, (2004) "Range-Doppler Imaging Using an Analog Optical Signal Processor with Agile Waveform Sets"

R. R. Reibel, K.D. Merkel, Z. Cole, D. E. Benson, T. Chang, R. K.Mohan, W. R. Babbitt, Proceedings of GOMACTech Conference 2005, Las Vegas, NV, 422 (2005) "Ultra-Wideband Analog Optical Signal Processing of Complex Waveforms For Range-Doppler Radar Measurements"

F. Schlottau, K. H. Wagner, Journal of Luminescence 107, 90 (2004) "Demonstration of a continuous scanner and time-integrating correlator using spatial–spectral holography"

K. H. Wagner, F. Schlottau, M. Colice, G. Kriehn and R. T. Weverka, Meeting on Microwave Photonics 2003, Budapest, Hungary, (2003) "Photonic Multiple Beam Forming Systems for Broadband RF Antenna Arrays"

M. Zhu, W. R. Babbitt, C. M. Jefferson, Optical Letters Vol. 20 No. 2, 2514 (1995) "Continuous coherent transient optical processing in a solid"

S2 SPECTRAL ANALYSIS

T. Chang, M.Tian, R. K. Mohan, C. Renner, K. D. Merkel, and W. R. Babbitt, Optical Letters Vol. 30 No. 10, 1129 (2005) "Recovery of spectral features readout with frequency-chirped laser fields"

M.Colice, F. Schlottau, K. H. Wagner, Applied Optics Vol. 45 No. 25, 6393 (2006) "Broadband radio-frequency spectrum analysis in spectral-hole-burning media"

V. Lavielle, F. De Seze, I. Lorger!e, J.-L. Le Gouet, Journal of Luminescence 107, 75 (2004) "Wideband radio frequency spectrum analyzer: improved design and experimental results"

V. Lavielle, I. Lorgeré, and J.-L. Le Gouët, Optics Letters Vol. 28 No. 6, 384 (2003) "Wideband versatile radio-frequency spectrum analyzer"

I. Lorgere , L. Menager, V. Lavielle, J. Le Gouet, D. Dolfi, S. Tonda, J. Huignard, Journal of Modern Optics Vol. 49 No. 14/15, 2459 (2002) "Demonstration of a radio-frequency spectrum analyser based on spectral hole burning"

L. Ménager, I. Lorgeré, J. Le Gouët, Optical Letters Vol. 26 No. 16, 1245 (2001) "Demonstration of a radio-frequency spectrum analyzer based on spectral hold burning"

R. K. Mohan, T. Chang, M. Tian, S. Bekker, A. Olson, C. Ostrander, A. Khallaayoun, C. Dollinger, W. R. Babbitt, Z. Cole, R.R. Reibel, K. D. Merkel, Y. Sun, R. Cone, F. Schlottau, K. H. Wagner, Journal of Luminescence 127, 116 (2007) "Ultra-wideband spectral analysis using S2 technology"

R. K. Mohan, Z. Cole, R. R. Reibel, T. Chang,K. D. Merkel, W. R. Babbitt, M.Colice, F. Schlottau, K. H. Wagner, Meeting on Microwave Photonics 2004, Oqunquit, ME, (2004) "Microwave Spectral Analysis Using Optical Spectral Holeburning"

S2 LASER STABILIZATION

E. D. Black, American Association of Physics Teachers 69, 79 (2001) "An introduction to Pound–Drever–Hall laser frequency stabilization"

T. Bottger, Y. Sun, G. J. Pryde, G. Reinemer, R. L. Cone, Journal of Luminescence 94-95, 565 (2001) "Diode laser frequency stabilization to transient spectral holes and spectral diffusion in Er3 :Y2SiO5 at 1536 nm"

R. W. P. Drever, J. L. Hall, F.V. Kowalski, J. Hough, G. M. Ford, A.J. Munley, H. Ward, Applied Physics B Vol. 31, 97 (1983) "Laser Phase and Frequency Stabilization Using an Optical Resonator"

C. W. Oates, E. A. Curtis, L. Hollberg, Optical Letters Vol. 25 No. 21, 1603 (2000) "Improved short-term stability of optical frequency standards: approaching 1 Hz in 1 s with the Ca standard at 657 nm"

P. B. Sellin, N. M. Strickland, T. Bottger, J. L. Carlsten, R. L. Cone, Physical Review B Vol. 63, 155111 (2001) "Laser stabilization at 1536 nm using regenerative spectral hole burning"

N. M. Strickland, P. B. Sellin, Y. Sun, J. L. Carlsten, R. L. Cone, Physical Review B Vol. 62 No. 3, 1473 (2000) "Laser frequency stabilization using regenerative spectral hole burning"

S2 MATERIALS, PHYSICS, THEORY & TECHNIQUES

T. Chang, R. K. Mohan, M. Tian, T. L. Harris, W. R. Babbitt, K. D. Merkel, Physical Review A 70, 063803 (2004) "Frequency-chirped readout of spatial-spectral absorption features"

T. Chang, M. Tian, W. R. Babbitt, Journal of Luminescence 107, 129 (2004) "Numerical modeling of optical coherent transient processes with complexconfigurations—I. Angled beam geometry"

T. Chang, M. Tian, Z.W. Barber, W. R. Babbitt, Journal of Luminescence 107, 138 (2004) "Numerical modeling of optical coherent transient processes with complex configurations—II. Angled beams with arbitrary phase modulations"

K. D. Merkel, R. D. Peters, P. B. Sellin, K. S. Repasky, W. R. Babbitt, Optics Letters Vol. 25 No. 22, 1627 (2000) "Accumulated programming of a complex spectral grating"

N. Ohlsson, M. Nilsson, S. Kröll, R. K. Mohah, Optics Letters Vol. 28 No. 6, 450 (2003) "Long-time-storage mechanism for Tm:YAG in a magnetic field"

R. Reibel, Z. Barber, M. Tian, W.R. Babbitt, Journal of Luminescence 98, 355 (2002) "High bandwidth spectral gratings programmed with linear frequency chirps"

F. Schlottau, M. Colice, K. H. Wagner, W. R. Babbitt, Optics Letters Vol. 30 No. 22, 3003 (2005) "Spectral hole burning for wideband, highresolution"

M. Tian, Jun Zhao, Z. Cole, R. Reibel, W. R.Babbitt, Journal of the Optical Society of America B Vol. 18 No. 5, 673 (2001) "Dynamics of broadband accumulated spectral gratings in Tm3:YAG"

S2 TRUE TIME DELAY & PULSE SHAPING

Z. W. Barber, M. Tian, R. R. Reibel, W. R. Babbitt, Optics Express Vol. 10 No. 20, 1145 (2002) "Optical pulse shaping using optical coherent transients"

K. D. Merkel, W. R. Babbitt, K. E. Anderson, K. H. Wagner, Optics Letters Vol. 24 No. 20, 1386 (1999) "Variable-time-delay optical coherent transient signal processing"

R. R. Reibel, Z. W. Barber, J. A. Fischer, M. Tian, W. R. Babbitt, Journal of Luminescence 107, 103 (2004) "Broadband demonstrations of true-time delay using linear sideband chirped programming and optical coherent transients"

R. Reibel, Z. Barber, M. Tian, W. R. Babbitt, Optics Letters Vol. 27 No. 7, 494 (2002) "Temporally overlapped linear frequency-chirped pulse programming for true-time-delay applications"

M. Tian, R. Reibel, W. R. Babbitt, Optics Letter Vol. 26 No. 15, 1143 (2001) "Demonstration of optical coherent transient true-time delay at 4 Gbits/s"

L. Gao, S. I. Herriot, K. H. Wagner, Optics Letters Vol. 31, No. 22, 3360 (2006) "Sluggish light for radio-frequency true-time-delay applications with a large time–bandwidth product"

OPTICAL RING OSCILLATORS

M. Ishikawa, H. Yasaka, F. Kano, Y. Yoshikuni, IEEE Photonics Technology Letters Vol. 11 No. 12, 1668 (1999) "Optical Frequency Sweeper Using an Optical Ring Circuit with a Tunable Injection-Locking Filter"

K. Shimizu, T. Horiguchi, Y. Koyamada, Optics Letters Vol. 17 No. 18, 1307 (1992) "Technique for translating light-wave frequency by using an optical ring circuit containing a frequency shifter"

H. Takesue, F. Yamamoto, T. Horiguchi, IEEE Photonics Technology Letters Vol. 12 No. 1, 79 (2000) "Stable Lightwave Frequency Synthesis Over 1-THz Span Using Fabry–Perot Cavity Containing Polarization-Rotation Elements and Actively Controlled Tunable Bandpass Filter"

PHOTODETECTORS

P. C. Hobbs, Applied Optics Vol. 36 No. 4, 903 (1997) "Ultrasensitive laser measurements without tears"

AMPLIFICATION

R. R. Reibel, Z. Barber, M. Tian, W. R. Babbitt, Journal of the Optical Society of America B Vol. 19 No. 10, 2315 (2002) "Amplification of high-bandwidth phase-modulated signals at 793 nm"