Nonlinear Faraday rotation for optical limitation

Taskova, E.; Gateva, S.; Alipieva, E.; Kowalski, Krzysztof; Głódź, M.; Szonert, J.

doi:10.1364/ao.43.004178

Cited by 14 publications

(5 citation statements)

References 15 publications

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“…The same mechanism also suppresses amplitude fluctuations of the signal. Optical limitation based on various mechanisms is of interest in many fields [90,94,95,98]. However, authors are not aware of any reports on the application of this property directly to the registration of spectra in an OIL based system using the AOM frequency sweep.…”

Section: Discussionmentioning

confidence: 99%

Opto-Electronics Review

Szonert,

Głódź,

Kowalski

2021

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We developed a three-stage, amplifying, tunable diode laser system that comprises a master laser in a Littrow configuration, frequency-stabilized by dichroic atomic vapour laser lock, acousto-optic frequency shifter, injection-locked slave laser, and tapered amplifier. The slave amplifies the injected frequency-shifted master beam while suppressing (within 0.5 %) the strong dependence of its intensity on the acousto-optic frequency shifter carrier frequency, thus acting as a strongly saturated optical limiting amplifier with constant output power. The resulting beam is then amplified in a tapered amplifier. The system provides an output power above 700 mW at a wavelength of 780 nm, with a time-averaged linewidth of 0.6 MHz, and a frequency drift below 2 MHz/h. Dichroic atomic vapour laser lock enables frequency stabilization in the range of 400 MHz around D2 lines of rubidium. The mode-hop-free tuning range amounts to 2 GHz. Determined by the acousto-optic frequency shifter model used, the fine-tuning range (precision of few tens kHz) spans 70 MHz. A description of the system was presented and its performance was tested. The basic components have been designed in our laboratory.

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Section: Discussionmentioning

confidence: 99%

Opto-Electronics Review

Szonert,

Głódź,

Kowalski

2021

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“…Interaction between matter and plane-polarized light has wide range of applications in modern technology like sensitive magnetometers 1 , 2 , occurrence of parity 3 , magneto-optical switching 4 , time-reversal violation 5 , laser frequency stabilization 6 , 7 , optical isolators 8 , 9 , current sensors 10 , 11 , optical limitation 12 , 13 , spectroscopy 14 – 16 , magneto-optical rotation and optical filters 17 – 20 . One such interaction leads to Magneto-optical rotation (MOR), a phenomenon where the plane of polarized light is rotated while passing through an anisotropic medium subjected to a magnetic field 21 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced magneto-optical rotation of probe field in thermal medium via spontaneous generated coherence

Sultan

Ali

Din

et al. 2022

Sci Rep

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A four-level double lambda closed atomic configuration is considered to study the polarization plane rotation of the probe beam through cold as well as thermal Rb$$^{87}$$ 87 atomic medium by varying the spontaneously generated coherence (SGC). Magnetic field and strong coupling field are applied to the atomic configuration. The light-matter interaction leads to enhanced the magneto-optical rotation. The intensity of the applied fields plays promising role in the generation and enhancement of birefringence. It ultimately enhances the polarization plane rotation of the probe beam in the Doppler medium. In the presence of both SGC and Doppler broadening effects, the optical rotation and transmission of the weak light beam are modified and controlled as well, which have potential applications in magnetometery and laser frequency stabilization.

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“…In fact, the difference between the refractive indices of the circular components of the linearly polarized light is the basis of the asymmetry made by the magnetic or optical fields. NMOR has found a large number of applications 32 and been used as a practical and useful method in optical filters 33 , 34 , optical limiting 35 , 36 , magnetometry 37 – 39 and laser-frequency stabilization 40 .…”

Section: Introductionmentioning

confidence: 99%

Laguerre-Gaussian modes generated vector beam via nonlinear magneto-optical rotation

Abad

Mahmoudi

2021

Sci Rep

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Laguerre-Gaussian (LG) beams contain a helical phase front with a doughnut-like intensity profile. We use the LG beam to introduce a rather simple method for generation of a vector beam (VB), a beam with spatially-dependent polarization in the beam cross section, via the nonlinear magneto-optical rotation (NMOR). We consider the NMOR of the polarization of a linearly polarized probe field passing through an inverted Y-type four-level quantum system interacting with a LG control field and a static magnetic field. It is shown that the polarization of the transmitted field is spatially distributed by the orbital angular momentum (OAM) of the LG control field, leading to generation of the VB with azimuthally symmetric polarization distribution. We show that the polarization and intensity distributions of the VB spatially vary by changing the OAMs of the LG control field. Moreover, the radial index of the LG control field has a major role in more spatially polarization distributing of the VB. It is shown that the intensity of the generated VBs in different points of the beam cross section can be controlled by the OAM as well as the radial index of the LG control field. However, the VB with highly spatially distributed can be generated for higher values of the radial index of LG control field. The analytical calculations determine the contribution of the different nonlinear (cross-Kerr effect) phenomena on the generation of the VB. We show that the VB is mainly generated via birefringence induced by the applied fields. Finally, we use asymmetric LG (aLG) beams for making the VBs with asymmetric polarization distribution. It is shown that by applying aLG beams, the azimuthal symmetry of the polarization distribution breaks and the asymmetric polarization distribution can be controlled by OAM and radial index of the aLG control field. The obtained results may find more interesting applications in fiber/free space optical communication to enhance the capacity of the information transmission.

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Nonlinear Faraday rotation for optical limitation

Cited by 14 publications

References 15 publications

Opto-Electronics Review

Opto-Electronics Review

Enhanced magneto-optical rotation of probe field in thermal medium via spontaneous generated coherence

Laguerre-Gaussian modes generated vector beam via nonlinear magneto-optical rotation

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