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Intensity Noise Reduction Of Semiconductor Lasers Using External Optical Feedback
Conference proceeding

Intensity Noise Reduction Of Semiconductor Lasers Using External Optical Feedback

Tsang-Der Ni, Xiangdong Zhang, A.S Daryous and Afshin S Daryoush
LEOS 1993 Summer Topical Meeting Digest on Optical Microwave Interactions/Visible Semiconductor Lasers/Impact of Fiber Nonlinearities on Lightwave Systems/Hybrid Optoelectronic Integration and Packagi
1993
DOI: https://doi.org/10.1109/LEOSST.1993.696815

Abstract

Diode lasers Frequency Laser feedback Laser modes Laser noise Noise reduction Optical feedback Optical noise Semiconductor device noise Semiconductor lasers
A clear choice in design of an optically fed phased array antenna is T/R level data mixing architecture [l]. The advantage of this architecture, however, lies in the use of optically distributed frequency reference and data links. The performance of directly modulated fiberoptic links at microwave frequencies is very poor in terms of gain and dynamic range. We have been able to devise methods to extend the effective bandwidth of directly modulated fiberoptic links to high microwave frequencies, resulting in synchronization of millimeter wave oscillators [2]. However, the measured dynamic range of the receivers in the T/R level data mixing is limited by the data signal fiber optic link performance [1]. Furthermore, the dynamic range of the directly modulated fiber optic links is dictated by the linearity and relative intensity noise (RIN) of semiconductor laser diode [3]. A method based on the coherent feedback to the laser diode, which achieved an efficient frequency response over a narrow band corresponding to the frequency reference signals was demonstrated [ 4]. In this paper we demonstrate the potential of this technique to significantly reduce the RIN of laser at data signal frequencies.

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