Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

942
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
942
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

990
Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
990
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

1.6K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
1.6K
Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

454
Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence of...
454
Bus Impedance Matrix01:24

Bus Impedance Matrix

552
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
552
MOS Capacitor01:25

MOS Capacitor

1.7K
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
1.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Room-Temperature Quasi-CW Random Lasing in a Tin-Perovskite Ultrathin Film.

The journal of physical chemistry letters·2026
Same author

Mechano-optically co-designed highly-scalable silicon photonic MEMS switches with quasi-buckling-free 2 × 2 horizontal adiabatic directional couplers.

Microsystems & nanoengineering·2026
Same author

Ultraviolet-C to mid-infrared supercontinuum generation in periodically poled lithium tantalate waveguides.

Light, science & applications·2026
Same author

High-efficiency ultraviolet UAV communications using an azimuthally omnidirectional optical antenna.

Optics letters·2026
Same author

Precision limits in precision-aligned direct-drive and direct-detection architectures for photonic computing.

Optics letters·2026
Same author

Harnessing diverse hybrid integration for bridging trans-scale multi-dimensional fiber-chip data transmission and processing.

Light, science & applications·2026

Related Experiment Video

Updated: Mar 12, 2026

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

9.9K

Monolithically integrated reconfigurable add-drop multiplexer for mode-division-multiplexing systems.

Shipeng Wang, Hao Wu, Hon Ki Tsang

    Optics Letters
    |November 15, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces the first integrated reconfigurable optical add-drop multiplexer (ROADM) for mode-division multiplexing. This silicon photonic device enables flexible add/drop functionality for four mode channels.

    More Related Videos

    Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
    08:48

    Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

    Published on: September 25, 2020

    6.3K
    Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls
    10:39

    Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls

    Published on: April 12, 2018

    7.8K

    Related Experiment Videos

    Last Updated: Mar 12, 2026

    Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
    11:54

    Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

    Published on: March 13, 2017

    9.9K
    Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
    08:48

    Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

    Published on: September 25, 2020

    6.3K
    Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls
    10:39

    Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls

    Published on: April 12, 2018

    7.8K

    Area of Science:

    • Photonics
    • Optical Communications
    • Integrated Optics

    Background:

    • Mode-division multiplexing (MDM) is a promising technique for increasing optical communication capacity.
    • Existing reconfigurable optical add-drop multiplexers (ROADMs) often lack integration and mode selectivity.
    • Silicon photonics offers a platform for miniaturized and scalable optical devices.

    Purpose of the Study:

    • To propose and demonstrate the first integrated reconfigurable optical add-drop multiplexer (ROADM) for MDM systems.
    • To achieve flexible and independent add/drop functionality for multiple spatial modes.
    • To leverage silicon photonics for compact and efficient optical network components.

    Main Methods:

    • Monolithic integration of a four-channel mode demultiplexer, four thermo-optic Mach-Zehnder switches (MZSs), and a four-channel mode multiplexer on silicon.
    • Design for transverse magnetic (TM) polarization operation.
    • Thermal control of MZSs for selective add/drop of mode channels.

    Main Results:

    • Successful demonstration of an integrated ROADM for four mode channels.
    • Excess loss of 1-5 dB and extinction ratio of 15-20 dB for added/dropped channels.
    • Operation demonstrated in the 1535-1565 nm wavelength range.

    Conclusions:

    • The developed integrated ROADM is a key enabling component for future mode-division multiplexing networks.
    • The device offers flexible and efficient control over individual mode channels.
    • This work paves the way for scalable and high-capacity optical communication systems based on MDM.