Results 21 to 30 of about 139,447 (303)
All fiber, low threshold, widely tunable single-frequency, erbium-doped fiber ring laser with a tandem fiber Fabry–Perot filter [PDF]
, 1991 An all fiber, widely tunable, single-frequency, erbium-doped fiber ring laser was constructed with a threshold pump power as low as 10 mW. Tuning over more than 30 nm was obtained by applying 0 to 17 dc V to an intracavity fiber Fabry–Perot filter ...
Dawson, Jay W. +3 more
core +1 more source
Role of Nanoimprint Lithography for Strongly Miniaturized Optical Spectrometers
Nanomaterials, 2021 Optical spectrometers and sensors have gained enormous importance in metrology and information technology, frequently involving the question of size, resolution, sensitivity, spectral range, efficiency, reliability, and cost.
Hartmut Hillmer +7 more
doaj +1 more source
Broad-band grating filters for thin-film optical waveguides [PDF]
, 1977 Broad-band grating filters have been fabricated on glass thin-film waveguides and evaluated with a tunable dye laser. Measured and calculated filter responses were found to be in good agreement.
Hong, C. S. +4 more
core +1 more source
Power-Efficient Electronically Tunable Fractional-Order Filter
Fractal and Fractional, 2023 This article describes a low-voltage, low-power fractional-order low-pass filter (FO-LPF) of order 1 + α, which is implemented using a voltage differencing differential difference amplifier (VDDDA).
Sadaf Tasneem +3 more
doaj +1 more source
Tunable Active Band-Pass RC-Filter
Известия высших учебных заведений России: Радиоэлектроника, 2018 This article provides a technique for design and simulation of an active second order band-pass filter with lineal tuning of Q-factor and independent tuning over a wide range of resonant frequency and transfer coefficient. The tunable band-pass RC-filter
Yu. M. Inshakov, A. V. Belov
doaj +1 more source
LOW PASS AND QUAD BAND PASS TUNABLE FILTER BASED ON STUB RESONATOR TECHNIQUE [PDF]
Jordanian Journal of Computers and Information Technology, 2019 An electronically tunable multi-passband filter using one varactor diode is implemented based on transmission line stub method for passing several most favourable applications through multiple operating bands.
Yanal S. Faouri +3 more
doaj +1 more source
Narrow-band optical filter through phase conjugation by nondegenerate four-wave mixing in sodium vapor [PDF]
, 1981 An ultrahigh-Q tunable optical filter with a FWHM bandwidth of 41 MHz is demonstrated. The filtering is produced by nondegenerate phase conjugation through four-wave mixing in atomic-sodium vapor.
Gluck, Natalie S. +2 more
core +1 more source
, 2022 Tunable filters enable dynamic spectrum access for the wireless systems, and the tunable bandpass filters with constant bandwidth (BW) are most favorable for practical applications. This chapter investigates the synthesis and realization techniques for the tunable filters using the coupling matrix with variable entries synthesizes the tunable filter ...
openaire +1 more source
Tunable Add–Drop Filter With Hollow Bottlelike Microresonators
IEEE Photonics Journal, 2018 In this paper, we report the narrow-band tunable add–drop filter (ADF) based on the hollow bottlelike microresonator with two taper fibers corresponding to the bus and drop waveguides.
Zhong-Hao Zhou +5 more
doaj +1 more source
IEEE Access, 2020 Based on tapered Triple-Core Photonic Crystal Fiber (TCPCF), a high performance tunable Dual-Wavelength Erbium-Doped Fiber Laser (DW-EDFL) is proposed and experimentally demonstrated.
Zijuan Tang +6 more
doaj +1 more source