Publication # 241

C. Debaes, A. Bhatnagar, D. Agarwal, R. Chen,  G. A. Keeler, N. C. Helman, H. Thienpont,  
and D. A. B. Miller, "Receiver-less Optical Clock Injection for Clock Distribution Networks,"
IEEE J. Sel. Top. Quantum Electron. 9, 400-409 (2003)

We present a new technique of injecting clocks optically onto CMOS chips without the use of a receiver amplifier. We discuss the benefits of such a direct approach and present proof-of-principle experiments of the technique. We analytically compare a receiver-less optical clock distribution and an electrical clock distribution in a fan-out-of-four clock tree to evaluate the timing and power benefits of the optical approach for present microprocessors. We also compare receiver-less direct injection of optical clocks to trans-impedance receiver based injection within the same distribution framework.


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