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

Receiver Operating Characteristic Plot01:15

Receiver Operating Characteristic Plot

496
A ROC (Receiver Operating Characteristic) plot is a graphical tool used to assess the performance of a binary classification model by illustrating the trade-off between sensitivity (true positive rate) and specificity (false positive rate). By plotting sensitivity against 1 - specificity across various threshold settings, the ROC curve shows how well the model distinguishes between classes, with a curve closer to the top-left corner indicating a more accurate model. The area under the ROC curve...
496
Speed of Sound in Gases01:08

Speed of Sound in Gases

4.1K
The speed of sound in a gaseous medium depends on various factors. Since gases constitute molecules that are free to move, they are highly compressible. Hence, sound waves travel slowly through gases. Thermodynamics helps us understand the relationship between pressure, volume, and temperature of gases, thus, the speed of sound in an ideal gas can be determined using the laws of thermodynamics. At the same time, Newton's laws of motion and the continuity equation of fluid dynamics also come...
4.1K
Speed of a Transverse Wave01:13

Speed of a Transverse Wave

4.0K
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
4.0K
Distribution of Molecular Speeds01:27

Distribution of Molecular Speeds

5.6K
The motion of molecules in a gas is random in magnitude and direction for individual molecules, but a gas of many molecules has a predictable distribution of molecular speeds. This predictable distribution of molecular speeds is known as the Maxwell-Boltzmann distribution. The distribution of molecular speeds in liquids is comparable to that of gases but not identical and can help to understand the phenomenon of the boiling and vapor pressure of a liquid. Consider that a molecule requires a...
5.6K
Drag Force and Terminal Speed01:18

Drag Force and Terminal Speed

3.5K
An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
3.5K
Deriving the Speed of Sound in a Liquid01:09

Deriving the Speed of Sound in a Liquid

982
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
982

You might also read

Related Articles

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

Sort by
Same author

Splice-altering TP53 missense mutations as drivers of dysfunction and targets for RNA-based therapy.

Stem cell research & therapy·2026
Same author

Metabolic transcriptomic subtyping defines distinct immunogenomic and clinical landscapes in non-small cell lung cancer.

NPJ precision oncology·2026
Same author

Biomimetic Nanogels Programmed for Irreversible-Electroporation-Primed Tumor Microenvironments to Elicit Durable Antitumor Immunity.

Biomaterials research·2026
Same author

2D MoS<sub>2</sub>-conformal 3D-printed platform for dual-phototherapy and bone regeneration.

Nano convergence·2026
Same author

<i>In situ</i> engineered silicon-magnesium implants orchestrate sequential immunomodulation, angiogenesis, and osteogenesis for bone repair.

Materials today. Bio·2026
Same author

PIF4 enhances temperature-independent tolerance to TSWV in Nicotiana benthamiana.

Scientific reports·2026

Related Experiment Video

Updated: Feb 15, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
07:28

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

11.2K

High-speed waveguide photodetector for 64  Gbaud coherent receiver.

Young-Ho Ko, Joong-Seon Choe, Won Seok Han

    Optics Letters
    |February 6, 2018
    PubMed
    Summary

    A novel high-speed waveguide photodetector was developed for integrated coherent receivers. This device achieves high responsivity and low loss, enabling 64 Gbaud operation.

    More Related Videos

    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy
    08:01

    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy

    Published on: May 12, 2020

    8.7K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.7K

    Related Experiment Videos

    Last Updated: Feb 15, 2026

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

    Published on: August 30, 2012

    11.2K
    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy
    08:01

    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy

    Published on: May 12, 2020

    8.7K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.7K

    Area of Science:

    • Photonics and Optoelectronics
    • Integrated Optics
    • Semiconductor Devices

    Background:

    • Integrated coherent receivers are crucial for high-capacity optical communication systems.
    • Waveguide photodetectors are key components in these receivers, requiring high speed and low loss.
    • Existing photodetectors face challenges in achieving optimal performance for advanced modulation formats.

    Purpose of the Study:

    • To design and fabricate a high-speed waveguide photodetector for 64 Gbaud integrated coherent receivers.
    • To optimize the device for high responsivity and low polarization-dependent loss.
    • To enhance electrical properties for improved high-speed operation.

    Main Methods:

    • Fabrication of a waveguide photodetector with dual laterally tapered spot-size converters.
    • Optimization of optical and electrical properties using beam propagation method simulation.
    • Adjustment of matching layer thickness and n-doped upper taper for enhanced performance.

    Main Results:

    • Achieved high responsivity of 0.73 A/W and low polarization-dependent loss of 0.27 dB.
    • Demonstrated a 3 dB bandwidth of 45 GHz for high-speed operation.
    • Experimental results closely matched simulation predictions.

    Conclusions:

    • The developed waveguide photodetector meets the stringent requirements for 64 Gbaud integrated coherent receivers.
    • The design incorporating spot-size converters offers excellent optical and electrical performance.
    • This work contributes to the advancement of high-speed optical communication technologies.