variable optical delay line (General Photonics)
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General Photonics
variable optical delay line
Variable Optical Delay Line, supplied by General Photonics, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/variable+optical+delay+lines/optical+delay+line/us09571205-438-12-10
Average 90 stars, based on 1 article reviews
Variable Optical Delay Line, supplied by General Photonics, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/variable+optical+delay+lines/optical+delay+line/us09571205-438-12-10
Average 90 stars, based on 1 article reviews
variable optical delay line - by Bioz Stars,
2026-10
90/100 stars
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Generated:Article Title: Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors Article Snippet: Identical components are placed in both optical paths of the MZI to reduce its temperature dependence: each path consists of a compact tunable fiber delay line (General Photonics VDL-004, 130 ps tuning range) and a Article Title: Methods of Feedback Control for Adaptive Counter-Phase Optical Interference Cancellation Article Snippet: We describe two methods of automatically tuning the optical parameters of the optical counter-phase interferencecancellation system.. The methods not only achieve signal cancellation automatically but also permit that cancellation to be maintained in the presence of dynamic amplitude and phase fluctuations in the input signal.. The purpose of this paper is twofold: First, we show that this conceptually simple optical method of interference cancellation readily lends itself to a simple method of closed-loop control and second, we introduce a novel method of optical closed-loop control. Article Title: Systems approach to interference cancellation Article Snippet: In our laboratory setup, this Article Title: Scalable high-rate, high-dimensional time-bin encoding quantum key distribution Article Snippet: The relative temporal delay between the Amplification:Article Title: Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors Article Snippet: Identical components are placed in both optical paths of the MZI to reduce its temperature dependence: each path consists of a compact tunable fiber delay line (General Photonics VDL-004, 130 ps tuning range) and a Article Title: Methods of Feedback Control for Adaptive Counter-Phase Optical Interference Cancellation Article Snippet: We describe two methods of automatically tuning the optical parameters of the optical counter-phase interferencecancellation system.. The methods not only achieve signal cancellation automatically but also permit that cancellation to be maintained in the presence of dynamic amplitude and phase fluctuations in the input signal.. The purpose of this paper is twofold: First, we show that this conceptually simple optical method of interference cancellation readily lends itself to a simple method of closed-loop control and second, we introduce a novel method of optical closed-loop control. Article Title: Systems approach to interference cancellation Article Snippet: In our laboratory setup, this Article Title: Scalable high-rate, high-dimensional time-bin encoding quantum key distribution Article Snippet: The relative temporal delay between the Transmission Assay:Article Title: Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors Article Snippet: Identical components are placed in both optical paths of the MZI to reduce its temperature dependence: each path consists of a compact tunable fiber delay line (General Photonics VDL-004, 130 ps tuning range) and a Article Title: Methods of Feedback Control for Adaptive Counter-Phase Optical Interference Cancellation Article Snippet: We describe two methods of automatically tuning the optical parameters of the optical counter-phase interferencecancellation system.. The methods not only achieve signal cancellation automatically but also permit that cancellation to be maintained in the presence of dynamic amplitude and phase fluctuations in the input signal.. The purpose of this paper is twofold: First, we show that this conceptually simple optical method of interference cancellation readily lends itself to a simple method of closed-loop control and second, we introduce a novel method of optical closed-loop control. Article Title: Systems approach to interference cancellation Article Snippet: In our laboratory setup, this Article Title: Scalable high-rate, high-dimensional time-bin encoding quantum key distribution Article Snippet: The relative temporal delay between the |
![Alice’s setup. The 65-ps-long pulses of light are created by modulating 1549.16 nm continuous wave (CW) laser (PPCL300, PURE Photonics) at 500 MHz rate with an intensity modulator (IM). The drive signal is generated by an arbitrary waveform generator (AWG) and amplified by a 25-GHz-bandwidth amplifier (AMP), synchronized with Bob’s clock through a classical channel (CC, red line). A fiber beam splitter (BS) with a ratio of 99:1 and a powermeter (PM) are used to monitor the power of the laser pulses. Subsequently, an unbalanced Mach–Zehnder interferometer (UMZI1, MINT, Kylia) with a path-length difference equivalent to 625 ps is applied to prepare the time-bin qubits to be teleported. Following with a spectrally filtering by a 10-GHz-wide fiber Bragg grating (FBG) combined with an <t>optical</t> circulator (CIR) and a strong attenuation to the single photon level by a <t>variable</t> optical attenuator (VOA), the prepared qubits are sent to Charlie through a 22 km fiber quantum channel (QC), \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text{Q}{\text{C}}_{\text{A}\to \text{C}}$$\end{document} Q C A → C blue line - featuring 6.8 dB loss. Bob’s setup. Two pump laser pulses separated by 625 ps with the same repetition rate of Alice are generated using a 1540.56 nm CW laser (PPCL300, PURE Photonics) in conjunction with an IM. The pump power is amplified, adjusted, and monitored by an erbium-doped fiber amplifier (EDFA), VOA, and 99:1 BS with a PM, respectively. A polarization controller (PC) and polarization beam splitter (PBS) are used to ensure the polarization alignment for maximizing the efficiency of phase matching in the periodically poled lithium niobate waveguide. The time-bin entangled state of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$|{\varPhi }^{+}{{\rangle }}={2}^{-1/2}({|ee}{{\rangle }}+{|ll}{{\rangle }})$$\end{document} ∣ Φ + ⟩ = 2 − 1 / 2 ( ∣ e e ⟩ + ∣ l l ⟩ ) is generated using cascaded second-order nonlinear processes in the PPLN waveguide module (see Materials and Methods), with mean photon pair number of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mu }_{\text{SPDC}}=0.042$$\end{document} μ SPDC = 0.042 in the experiment. The entangled photon pairs are spectrally filtered into signal (1531.87 nm) and idler (1549.16 nm) ones using dense-wavelength division multiplexers (DWDMs) and FBGs with a full width at half maximum bandwidth of 125 GHz and 10 GHz, respectively. The idler photons are sent to Charlie via another 22 km fiber QC, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text{Q}{\text{C}}_{\text{B}\to \text{C}}$$\end{document} Q C B → C - featuring 6.4 dB loss and the state of signal photons (stored in a 20 km fiber spool) is analyzed using UMZI2 (625 ps transmission <t>delay,</t> MINT, Kylia), two superconducting nanowire single photon detectors (SNSPDs, P-CS-16, PHOTEC) - cooled to 2.2 K in a cryostat and with 80% detection efficiency, and a time-to-digital converter (TDC, ID900, ID Quantique). Charlie’s setup. The photons from Alice and Bob are projected onto the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$|{\psi }^{-}{{\rangle }}$$\end{document} ∣ ψ − ⟩ Bell state using a 50:50 BS and two SNSPDs with 60% detection efficiency. To ensure the indistinguishability of the two photons distributed through a 22-km-long fiber channel for each, we actively stabilize the arrival times and polarization with an active and automatic feedback system on both \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text{Q}{\text{C}}_{\text{A}\to \text{C}}$$\end{document} Q C A → C and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text{Q}{\text{C}}_{\text{B}\to \text{C}}$$\end{document} Q C B → C channels. The timing and polarization feedback signals (Time feedback and Pol. feedback) are generated from field-programmable gate array (FPGA) circuits and digital to analog convertor (DAC) circuits, respectively, and sent to optical variable delay <t>lines</t> (OVDLs, MDL-002, General Photonics) and polarization tracker modules (PTMs, POS-002, General Photonics) to compensate for the time and polarization drifts. Two optical isolators (ISOs) with ~55 dB isolations are used to shied Alice and Bob from attacks. The synchronization (Sync) between the three nodes is performed by classical optical pulses through classical channels (CCs), and assisted with AWGs, distributed feedback (DFB) lasers, photon detectors (PDs) and a tee connector (TC). Both QC and CC are dark fiber cables (FC). The electronic cables (EC) are denoted by green lines (see Materials and Methods for more details about stabilization and synchronization)](https://pub-med-central-images-cdn.bioz.com/pub_med_central_ids_ending_with_2182/pmc10172182/pmc10172182__41377_2023_1158_Fig2_HTML.jpg)