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Publikováno v:
Journal of Lightwave Technology. 21:3116-3124
Phase-encoded optical sampling allows radio-frequency and microwave signals to be directly down-converted and digitized with high linearity and greater than 60-dB (10-effective-bit) signal-to-noise ratio. Wide-band electrical signals can be processed
Autor:
R.C. Williamson, Gary E. Betts, J.C. Twichell, K.G. Ray, Frederick J. O'Donnell, J.L. Wasserman, Paul W. Juodawlkis, J.J. Hargreaves, R.D. Younger
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 49:1840-1853
Optically sampled analog-to-digital converters (ADCs) combine optical sampling with electronic quantization to enhance the performance of electronic ADCs. In this paper, we review the prior and current work in this field, and then describe our effort
Publikováno v:
MWP 2003 Proceedings. International Topical Meeting on Microwave Photonics, 2003..
The combination of phase-encoded optical sampling and optical time-division demultiplexing has been demonstrated to extend the performance of electronic analog-to-digital converters (ADCs). We report a 10-effective-bit, 505-MS/s ADC with a spur-free
Publikováno v:
2003 Digest of LEOS Summer Topical Meeting (Cat. No.03TH8701).
Investigation of the timing jitter generated by propagating high-power optical pulses through short lengths of optical fiber is presented. It is measured using the phase-encoded optical sampling technique. Comparisons are made between measured and si
Publikováno v:
2003 Digest of LEOS Summer Topical Meeting (Cat. No.03TH8701).
The aim of the paper is to obtain an RF beat signal that has a stability similar to that of the laser lines. The setup consists of a CO/sub 2/ laser that uses two different isotopes of C and or O that oscillates at two optical frequencies in a single
Publikováno v:
2001 International Topical Meeting on Microwave Photonics. Technical Digest. MWP'01 (Cat. No.01EX476).
Phase-encoded optical sampling allows the processing of RF and microwave signals with high linearity and >60-dB signal-to-noise ratio in an optically sampled digital receiver. The wide analog-input bandwidth (>1 GHz) enables novel processing capabili
Publikováno v:
The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society.
We have demonstrated a new technique to characterize wideband nonlinear waveforms at microwave carrier frequencies. The analog sampling bandwidth can be increased with wider bandwidth sampling modulators and shorter optical pulses. The instantaneous
Autor:
A. Napoleone, R.C. Williamson, J.J. Hargreaves, L.J. Mahoney, Frederick J. O'Donnell, J.C. Twichell, Leo J. Missaggia, Paul W. Juodawlkis, Douglas C. Oakley, Joseph P. Donnelly, Steven H. Groves, K.M. Molvar
Publikováno v:
The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society.
The agreement between the measured nonlinear response and the absorption saturation simulation for different absorber thickness provides strong evidence of an absorption-saturation photodiode nonlinearity. We have improved the linearity of a photonic
Autor:
Farhan Rana, J.J. Hargreaves, Paul W. Juodawlkis, Jason J. Plant, Joseph P. Donnelly, J.C. Twichell, Rajeev J. Ram
Publikováno v:
LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242).
We report residual phase-noise measurements of both actively mode-locked fiber and semiconductor lasers using sinusoidal mode-locking frequencies between 500 MHz and 5 GHz. The fiber laser is a polarization maintaining erbium-doped fiber ring laser t