Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Frontiers in Optics

High Efficieny, High Speed Optical Modulation at a Telecom Wavelength Using the Quantum Zeno Effect in a Ladder Transition in Rb Atoms

K. Subramanian, Y. Wang, Yongming Tu, Shih Tseng, M. S. Shahriar

Published Jan 1, 2011• 0 citations
Publisher

Abstract

We show, theoretically and experimentally, how a high efficiency, high speed optical modulator can be realized at a telecommunication wavelength using the quantum zeno effect in a ladder transition in Rb atoms at room temperature.
DOI
10.1364/fio.2011.fthm4

Related papers

Quantum Zeno effect based high speed optical modulator at a telecom wavelength in a ladder transition in Rb atoms

Subramanian Krishnamurthy, Yu-Hong Wang, S. Tseng +2 more

We show theoretical simulations of how a high speed optical modulator can be realized at a telecommunication wavelength using the buffer gas induced relaxation in a ladder transition in Rb atoms at room temperature.

Frontiers in Optics•Jan 1, 2012•0 citations

Optically Controlled Waveplate at a Telecom Wavelength Using a Ladder Transition in Rb Atoms for All-Optical Switching via the Quantum Zeno Effect

K. Subramanian, Yu-Hong Wang, S. Tseng +2 more

We show, theoretically and experimentally, how to realize an optically controlled waveplate at a telecommunication wavelength using a ladder transition in Rb atoms at room temperature for all-optical switching via the quantum Zeno effect.

Frontiers in Optics•Jan 1, 2011•0 citations

High efficiency optical modulation at a telecom wavelength using the quantum Zeno effect in a ladder transition in Rb atoms

Subramanian Krishnamurthy, Yu-Hong Wang, Yongming Tu +2 more

We demonstrate a high-efficiency optical modulator at ~1323 nm using the quantum Zeno effect in a ladder transition in a Rb vapor cell. The lower leg of the transitions represents the control beam while the upper leg of the transitions represents the signal beam. The cross-modulation of the signal beam transmission is observed as the control beam is intensity modulated, and is explained in terms of the quantum Zeno effect. We observe a modulation depth of near 100% at frequencies up to 1 MHz and demonstrate modulation at speeds up to 75 MHz, with a 3 dB bandwidth of about 5 MHz, limited by the homogeneous linewidth of the intermediate state. We also describe how much higher modulation speeds could be realized by using a buffer gas to broaden the transitions. We identify and explain the special conditions needed for optimizing the modulation efficiency. Numerical simulations of modulation at ~1 GHz are presented. The maximum modulation speed is found to scale with the pressure-broadened linewidth of the intermediate state, so that much higher speeds should be attainable.

Optics Express•Jun 5, 2012•14 citations

All-Optical Switch at Telecom Wavelength based on the Quantum Zeno Effect (QZE)

Subramanian Krishnamurthy, Yu-Hong Wang, Yongming Tu +2 more

We present experimental realizations and numerical simulations of an optically controlled Polarizer and Waveplate at telecom wavelength using ladder transitions in 87Rb. When combined, it can be used to realize a QZE based all-optical switch.

•Jan 1, 2013•0 citations

High-speed modulation in ladder transitions in Rb atoms using high-pressure buffer gas

Subramanian Krishnamurthy, Yu-Hong Wang, Yongming Tu +2 more

Modulators using atomic systems are often limited in speed by the rate of spontaneous emission. One approach for overcoming this limit is to make use of a buffer gas such as Ethane, which causes rapid fine structure mixing of the P(1/2) and P(3/2) states, and broadens the absorption spectra of the D1 and D2 lines in alkali atoms. Employing this effect, we show that one can achieve high speed modulation using ladder transitions in Rubidium. We demonstrate a 100-fold increase, due to the addition of the buffer gas, in the modulation bandwidth using the 5S-5P-5D cascade system. The observed bandwidth of ~200 MHz is within a factor of 2.5 of the upper bound of ~0.51 GHz for the system used, and is limited by various practical constraints in our experiment. We also present numerical simulations for the system and predict that a much higher modulation speed should be achievable under suitable conditions. In combination with a tapered nano fiber or a SiN waveguide, it has the potential to be used for high-speed, low-power all-optical modulation.

Optics Express•Apr 23, 2015•6 citations

Buffer-gas assisted high speed optical modulator using ladder transitions in Rb

Subramanian Krishnamurthy, Yu-Hong Wang, Yanfei Tu +2 more

•Jan 1, 2013•0 citations
We demonstrate a high-efficiency optical modulator at ~1323 nm using the quantum Zeno effect in a ladder transition in a Rb vapor cell. The lower leg of the transitions represents the control beam while the upper leg of the transitions represents the signal beam. The cross-modulation of the signal beam transmission is observed as the control beam is intensity modulated, and is explained in terms of the quantum Zeno effect. We observe a modulation depth of near 100% at frequencies up to 1 MHz and demonstrate modulation at speeds up to 75 MHz, with a 3 dB bandwidth of about 5 MHz, limited by the homogeneous linewidth of the intermediate state. We also describe how much higher modulation speeds could be realized by using a buffer gas to broaden the transitions. We identify and explain the special conditions needed for optimizing the modulation efficiency. Numerical simulations of modulation at ~1 GHz are presented. The maximum modulation speed is found to scale with the pressure-broadened linewidth of the intermediate state, so that much higher speeds should be attainable.
Modulators using atomic systems are often limited in speed by the rate of spontaneous emission. One approach for overcoming this limit is to make use of a buffer gas such as Ethane, which causes rapid fine structure mixing of the P(1/2) and P(3/2) states, and broadens the absorption spectra of the D1 and D2 lines in alkali atoms. Employing this effect, we show that one can achieve high speed modulation using ladder transitions in Rubidium. We demonstrate a 100-fold increase, due to the addition of the buffer gas, in the modulation bandwidth using the 5S-5P-5D cascade system. The observed bandwidth of ~200 MHz is within a factor of 2.5 of the upper bound of ~0.51 GHz for the system used, and is limited by various practical constraints in our experiment. We also present numerical simulations for the system and predict that a much higher modulation speed should be achievable under suitable conditions. In combination with a tapered nano fiber or a SiN waveguide, it has the potential to be used for high-speed, low-power all-optical modulation.