International Conference on Photonics in Switching

Ultrafast Optical Switch Based on the Quantum Coherence Swapping

Byoung Seung HAM

Published Jan 1, 2001• 0 citations

Abstract

A new type of ultrafast optical switching is demonstrated by using quantum coherence swapping in a four-level system. For potential applications of the quantum coherence swapping, hyper-THz optical switches in fiber-optic communications are discussed.

DOI: 10.1364/ps.2001.pthb5

Related papers

A Novel Method of All-optical Switching: Quantum Router

Byoung Seung HAM

Subpicosecond all-optical switching method based on the simultaneous two-photon coherence exchange is proposed and numerically demonstrated. The optical switching mechanism is based on the optical field induced dark resonance swapping via nondegenerate four-wave mixing processes. For potential applications of ultrafast all-optical switching in fiber-optic communications, 10-THz channel number independent quantum router is discussed.

ETRI JournalSep 1, 200121 citations

Potential applications of dark resonance to subpicosecond optical switches in hyper-terahertz repetition rates

Byoung Seung HAM

Subpicosecond optical switching in hyper-terahertz repetition rates is numerically demonstrated using dark resonance based two-photon coherence swapping. The switching time and repetition rate demonstrated are one tenth the population relaxation time T1, and it is a breakthrough in the critical limitation of current technologies of optical switches. This demonstration implies potential applications of ultrafast optical switches to ultrahigh-capacity fiber-optic communications.

Applied Physics LettersMay 28, 200129 citations

NONLINEAR OPTICS OF ATOMS AND ELECTROMAGNETICALLY INDUCED TRANSPARENCY Dark resonance based optical switching

Byoung Seung HAM

An optical switching method based on dark resonance is proposed for ultrafast/ultrawide fibre-optic communications. The proposed switching method is based on dark-resonance induced refractive index changes in a three-level system interacting with two-colour laser lights. Two different mechanisms in the proposed optical switching method are discussed for the use of electromagnetically induced transparency and two-photon coherence induction. They are also compared for suitable applications in fibre-optic communications. Finally, a hyper-THz optical modulator is proposed, limited by current technologies due to carrier lifetime or population relaxation decay time.

Journal of Modern OpticsNov 1, 200219 citations

Coherent Interaction and its Applications to the Ultrafast Optical Switching.

Kenji Wada, Yoshio Cho

Ultrafast optical switching utilizing coherent interaction is reviewed in terms of its principle, problems, applications and features in conjunction with the result of numerical calculations.

The Review of Laser EngineeringJan 1, 19920 citations

Potential applications of dark resonance to ultra-wide-bandwidth modulators

Byoung Seung HAM

An entirely different method of optical modulation is proposed for ultra-high-capacity fiber-optic communications. The proposed technique is based on dark-resonance induced susceptibility changes. I discuss hyper-THz optical modulation by utilizing two-photon refractive index changes.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)Nov 13, 20020 citations

Coherence Switching in a Four-Level System: Quantum Switching

Byoung Seung HAM, Philip Hemmer

Dark resonance switching among three-laser interactions in a four-level system is observed by using an enhanced nondegenerate four-wave mixing technique. This coherence switching mechanism is based on simultaneous suppression and enhancement of two-photon absorption and has a novel application to high-speed optical switches.

Physical Review LettersMay 1, 2000168 citations