Related Experiment Video
Updated: Jan 21, 2026
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
11.9K
Fiber-Integrated Reversibly Wavelength-Tunable Nanowire Laser Based on Nanocavity Mode Coupling.
Ming-Hua Zhuge1, Zongyin Yang2, Jianpei Zhang3
1State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering , Zhejiang University , Hangzhou 310027 , China.
ACS Nano
|August 10, 2019
Summary
Researchers developed a novel, fiber-integrated nanolaser with a 42 nm tunable spectrum. This breakthrough offers a stable, reproducible light source for advanced optoelectronics and optical communications.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Miniaturized, wavelength-tunable nanolasers are crucial for on-chip optoelectronics, optical communications, and spectroscopy.
- Simultaneously achieving tunable gain media and high-quality nanoscale resonators presents significant challenges.
Purpose of the Study:
- To demonstrate a free-standing, fiber-integrated, reversibly wavelength-tunable nanolaser.
- To overcome the limitations of current nanolaser technology regarding tunability and resonator quality.
Main Methods:
- Utilized single bandgap-graded Cadmium Sulfoselenide (CdSSe) nanowires (NWs).
- Employed a coupled Fabry-Pérot/whispering gallery mode (FP/WGM) cavity.
- Integrated the nanolaser with optical fiber for practical applications.
Main Results:
- Achieved a 42 nm wide tunable spectrum at room temperature.
- Demonstrated high stability and reproducibility with a tuning spectral resolution of 1.13 nm.
- Developed a substrate-free device design for seamless integration.
Conclusions:
- The developed nanolaser offers a general approach to nanocavity coupling with high Q-factors.
- This technology enables ideal miniaturized modules for diverse applications in optics and optoelectronics.
- The fiber integration facilitates advanced optical fiber communications and information processing.
Related Concept Videos
02:32The de Broglie Wavelength
33.0K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
33.0K
01:07What is a Mode?
25.1K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
25.1K
01:21G-protein Coupled Receptors
131.6K
G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
131.6K
01:48Classification of Skeletal Muscle Fibers
59.4K
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
59.4K
01:14Ventilatory Modes
1.4K
Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
1.4K
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
1.6K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.6K