Polarization Control of VCSELs

Ostermann, Johannes; Michalzik, Rainer

doi:10.1007/978-3-642-24986-0_5

Cited by 20 publications

(11 citation statements)

References 170 publications

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“…Different parts for polariton based spin circuitry have already been realized 9,10,[20][21][22] with some recent exciting theoretical proposals 23,24 , but many challenges remain to be solved. Optical applications such as data communication or sensing benefit from precise control over a laser's polarization and modulation speeds, ideally using nonresonant excitation schemes like spin-VCSELs [25][26][27] . In this spirit, a great deal of effort has been devoted to generating sources of linearly polarized light such as colloidal nanorods 28 , materials with anisotropic optical properties 29 , quantum dots 30 , and optical parametric oscillators 31 .…”

Section: Introductionmentioning

confidence: 99%

All-Optical Linear-Polarization Engineering in Single and Coupled Exciton-Polariton Condensates

Gnusov

Sigurðsson²,

Töpfer³

et al. 2021

Phys. Rev. Applied

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We demonstrate all-optical linear polarization control in semiconductor microcavities using an exciton-polariton condensate in an elliptically shaped optical trap. The microcavity inherent TE-TM splitting lifts the pseudospin degeneracy of the anisotropic trap ground state. The emerging fine structure modes are shown to be polarized linearly parallel and perpendicular to the trap major axis. We demonstrate polariton condensation into the excited pseudospin mode with high degree of linear polarization which rotates as we rotate the trap. We then extend our study to a system of two coupled linearly polarized condensates and demonstrate rich spin dynamics reflecting spontaneous synchronization and high correlation between the condensate pseudospins as a function of pump parameters. Our findings show a new type of polarization control with exciting perspectives in both spinoptronics and studies on extended systems of interacting nonlinear optical elements with anisotropic coupling strength and adjustable fine structure.I.

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Section: Introductionmentioning

confidence: 99%

All-Optical Linear-Polarization Engineering in Single and Coupled Exciton-Polariton Condensates

Gnusov

Sigurðsson²,

Töpfer³

et al. 2021

Phys. Rev. Applied

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“…To determine the polarization stability of the VCSELs, a polarizing beam splitter was used to split the optical output of the lasers by its polarization state (TE and TM), each recorded by two photodetectors as a function of applied current and varying operating temperatures [6]. The dependence of the orthogonal polarization extinction ratio (OPSR) on the temperature is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

MacV: VCSELs For Miniature Atomic Clocks

Zaouris

Knapp

Haji

et al. 2019

2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC)

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Compact coherent population trapping (CPT) based clocks require single-mode, low-power consumption, high-speed and polarization-stable laser sources. We report our progress in developing customized vertical cavity surface emitting laser (VCSEL) diodes designed for operating on the D1 transition of cesium, and specifically tailored for CPT-based atomic clocks. The VCSELs provide high power (>1 mW), narrow linewidths (<100 MHz), mode-hop free tunability over 8 nm, and are shown to be polarization stable over a wide range of operating bias conditions (average polarization suppression >15 dB). Preliminary spectroscopy has been observed.

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“…Often, a majority of standard VCSELs on a wafer has equal polarization. However, the polarization can easily switch to an orthogonal direction upon changes of the bias current or the operating temperature [11]. Single-mode emission polarized parallel to the [011] GaAs crystal axis is maintained up to a current of 4.4 mA.…”

Section: Standard Vcselsmentioning

confidence: 99%

Metrological characterization of custom-designed 8946 nm VCSELs for miniature atomic clocks

Gruet¹,

Al-Samaneh²,

Kroemer³

et al. 2013

Opt. Express

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Abstract:We report on the characterization and validation of customdesigned 894.6 nm vertical-cavity surface-emitting lasers (VCSELs), for use in miniature Cs atomic clocks based on coherent population trapping (CPT). The laser relative intensity noise (RIN) is measured to be 1 × 10 −11 Hz −1 at 10 Hz Fourier frequency, for a laser power of 700 μW. The VCSEL frequency noise is 10 13 · f −1 Hz 2 /Hz in the 10 Hz < f < 10 5 Hz range, which is in good agreement with the VCSEL's measured fractional frequency instability (Allan deviation) of ≈ 1 × 10 −8 at 1 s, and also is consistent with the VCSEL's typical optical linewidth of 20-25 MHz. The VCSEL bias current can be directly modulated at 4.596 GHz with a microwave power of −6 to +6 dBm to generate optical sidebands for CPT excitation. With such a VCSEL, a 1.04 kHz linewidth CPT clock resonance signal is detected in a microfabricated Cs cell filled with Ne buffer gas. These results are compatible with state-of-the-art CPT-based miniature atomic clocks exhibiting a short-term frequency instability of 2-3×10 −11 at τ = 1 s and few 10 −12 at τ = 10 4 s integration time.

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Polarization Control of VCSELs

Cited by 20 publications

References 170 publications

All-Optical Linear-Polarization Engineering in Single and Coupled Exciton-Polariton Condensates

All-Optical Linear-Polarization Engineering in Single and Coupled Exciton-Polariton Condensates

MacV: VCSELs For Miniature Atomic Clocks

Metrological characterization of custom-designed 8946 nm VCSELs for miniature atomic clocks

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