Zheng, Z., Shen, S., Sardesai, H., Chang, C.-C., Marsh, J.H. , Karkhanehchi, M.M. and Weiner, A.M. (1999) Ultrafast two-photon absorption optical thresholding of spectrally coded pulses. Optics Communications, 167(1-6), pp. 225-233. (doi: 10.1016/S0030-4018(99)00313-2)
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Abstract
We report studies on two-photon absorption (TPA) GaAs p-i-n waveguide photodetectors as optical thresholders for proposed ultrashort pulse optical code-division multiple-access (CDMA) systems. For either chirped optical pulses or spectrally phase coded pseudonoise bursts, the TPA photocurrent response reveals a strong pulseshape dependence and shows good agreement with theoretical predictions and results from conventional SHG measurements. The performance limits of the TPA optical thresholders set by the encoded bandwidth in the spectral encoding-decoding process are also discussed based on numerical simulations. Our results show the feasibility of applying such devices as nonlinear intensity discriminators in ultrahigh-speed optical network applications.
| Item Type: | Articles |
|---|---|
| Additional Information: | The work at Purdue University was supported by AFOSR under contract F49620-95-1-0533 and by NSF under Grant ECS-9312256 and Grant ECS-9626967. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Marsh, Professor John |
| Authors: | Zheng, Z., Shen, S., Sardesai, H., Chang, C.-C., Marsh, J.H., Karkhanehchi, M.M., and Weiner, A.M. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Optics Communications |
| Publisher: | Elsevier |
| ISSN: | 0030-4018 |
| ISSN (Online): | 1873-0310 |
| Published Online: | 10 August 1999 |
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