High-speed inline holographic Stokesmeter imaging

Xue, Lei; Heifetz, Alexander; Tseng, Shao-Chin; Shahriar, M. S.

doi:10.1364/ao.48.003803

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…We proposed and demonstrated a PSG consisting of a pair of liquid crystal retarders (LCRs) and a polarizer in series to circumvent this problem in our previous study. 17 Due to the anisotropic optical property, an LCR can produce arbitrary retardation based on the voltage applied on it. This flexibility allows a configuration of the PSA free of insertion/removal, as shown in Fig.…”

Section: Automated Inline Stokesmetermentioning

confidence: 99%

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Automated Stokesmetric imaging laser radar system

Tseng

Tripathi

et al. 2012

Opt. Eng

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We report the design and implementation of a high-speed, automated laser radar (ladar) system with sensitivity enhanced by a polarimetric imaging technique. This ladar is able to analyze the Stokes vector of the reflected light from a target at video-rate. With a polarization state generator and a polarization state analyzer, the system is capable of performing a complete Mueller matrix imaging of the scene under observation. This polarization-sensitive ladar (pladar) is applied to various scenes and found to yield the ability to detect information that is indiscernible to a conventional, intensity-based ladar.

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Section: Automated Inline Stokesmetermentioning

confidence: 99%

“…This work builds on previous polarimetric studies carried out by our group. 12,17,18 Our system is capable of detecting all four components of the Stokes vector of light reflected from the object at video-rate. In addition, by varying the input polarization state, full Mueller matrix imaging is also realizable with such a system.…”

Section: Introductionmentioning

confidence: 99%

Automated Stokesmetric imaging laser radar system

Tseng

Tripathi

et al. 2012

Opt. Eng

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“…The optically controlled waveplate also has potential applications in Stokesmetric Imaging (SI). It is well documented that in many situations of interest, features indiscernible via conventional imaging become highly resolved under SI [10][11][12][13]. In a typical SI scenario, a target is illuminated by fully or partially polarized light.…”

Section: Introductionmentioning

confidence: 99%

Optically controlled waveplate at a telecom wavelength using a ladder transition in Rb atoms for all-optical switching and high speed Stokesmetric imaging

Krishnamurthy

Wang

et al. 2014

Opt. Express

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Abstract:We demonstrate an optically controlled waveplate at ~1323 nm using the 5S1/2-5P1/2-6S1/2 ladder transition in a Rb vapor cell. The lower leg of the transitions represents the control beam, while the upper leg represents the signal beam. We show that we can place the signal beam in any arbitrary polarization state with a suitable choice of polarization of the control beam. Specifically, we demonstrate a differential phase retardance of ~180 degrees between the two circularly polarized components of a linearly polarized signal beam. We also demonstrate that the system can act as a Quarter Wave plate. The optical activity responsible for the phase retardation process is explained in terms of selection rules involving the Zeeman sublevels. As such, the system can be used to realize a fast Stokesmetric Imaging system with a speed of nearly 5 MHz. When implemented using a tapered nano fiber embedded in a vapor cell, this system can be used to realize an ultra-low power all-optical switch as well as a Quantum Zeno Effect based all-optical logic gate by combining it with an optically controlled polarizer, previously demonstrated by us. We present numerical simulations of the system using a comprehensive model which incorporates all the relevant Zeeman sub-levels in the system, using a novel algorithm recently developed by us for efficient computation of the evolution of an arbitrary large scale quantum system.

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“…In combination with a tapered nano fiber (TNF) setup [6,[9][10][11], this approach can be used to produce an optical logic gate at extremely low powers of the control beam (~40nW). The optically controlled polarizer, in combination with the optically controlled waveplate, could also be used for high speed Stokesmetric Imaging (SI) [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Optically controlled polarizer using a ladder transition for high speed Stokesmetric Imaging and Quantum Zeno Effect based optical logic

Krishnamurthy

Wang

et al. 2013

Opt. Express

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We demonstrate an optically controlled polarizer at ~1323 nm using a ladder transition in a Rb vapor cell. The lower leg of the 5S(1/2),F = 1->5P(1/2),F = 1,2->6S(1/2),F = 1,2 transitions is excited by a Ti:Sapphire laser locked to a saturated absorption signal, representing the control beam. A tunable fiber laser at ~1323 nm is used to excite the upper leg of the transitions, representing the signal beam. When the control beam is linearly polarized, it produces an excitation of the intermediate level with a particular orientation of the angular momentum. Under ideal conditions, this orientation is transparent to the signal beam if it has the same polarization as the control beam and is absorbed when it is polarized orthogonally. We also present numerical simulations of the system using a comprehensive model which incorporates all the relevant Zeeman sub-levels in the system, and identify means to improve the performance of the polarizer. A novel algorithm to compute the evolution of large scale quantum system enabled us to perform this computation, which may have been considered too cumbersome to carry out previously. We describe how such a polarizer may serve as a key component for high-speed Stokesmetric imaging. We also show how such a polarizer, combined with an optically controlled waveplate, recently demonstrated by us, can be used to realize a high speed optical logic gate by making use of the Quantum Zeno Effect. Finally, we describe how such a logic gate can be realized at an ultra-low power level using a tapered nanofiber embedded in a vapor cell.

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High-speed inline holographic Stokesmeter imaging

Cited by 10 publications

References 16 publications

Automated Stokesmetric imaging laser radar system

Automated Stokesmetric imaging laser radar system

Optically controlled waveplate at a telecom wavelength using a ladder transition in Rb atoms for all-optical switching and high speed Stokesmetric imaging

Optically controlled polarizer using a ladder transition for high speed Stokesmetric Imaging and Quantum Zeno Effect based optical logic

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