Sagi Mathai

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Buses have historically provided a flexible communications structure in computer systems. However, signal integrity constraints of high-speed electronics have made multi-drop electrical busses infeasible. Instead, we propose an optical data bus for computer interconnections. It has two sets of optical waveguides, one as a fan-out and the other as a fan-in,(More)
Balanced photodetectors are of great interest to analog fiber optic links because they can suppress laser relative intensity noise (RM) and amplified spontaneous emission noise (ASE) from erbium-doped fiber amplifiers (EDFA) [ 11. Because balanced photodetectors can achieve shot noise-limited link performance, the noise figure and spurious-free dynamic(More)
In the last few years, remarkable progress has been made in ultrafast, and high-speed, high power photodetectors, as reviewed in [ 1,2]. In terms of applications, the high-speed photodetectors can be divided into four general different categories: (1) high-speed digital communication systems, (2) RF photonic systems, (3) ultrafast optoelectronic sampling,(More)
High power, high frequency photodetectors play a key role in determining the performance of analog and microwave fiber optic links. The high power photodetectors allows the use of high power laser sources in externally modulated links. This can significantly reduce the RF insertion loss, and increase the spurious free dynamic range and signal-to-noise ratio(More)
—Millimeter-wave generation by photomixing at 1.55 m in long-wavelength velocity-matched distributed pho-todetector (VMDP) is experimentally demonstrated. The VMDP exhibits a dc responsivity of 0.25 A/W, a breakdown voltage of 7–9 V, and up to 15-mA dc photocurrent without damage. Millimeter-wave output powers of 21 dBm at 75 GHz and 24 dBm at 95 GHz were(More)
The paper presents a new device for analog optical links, the balanced electroabsorption modulator, to allow the simultaneous cancellation of laser relative intensity noise, all even-order distortions, and third order intermodulation. The RF photonic link employing the new balanced modulator shows great improvement in the overall link performance with(More)
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