Simon Bridge said:Welcome to PF;
There is normally no difference between the terms, the second may be a typo.
A single-mode cavity is a type of optical cavity that supports only one mode of electromagnetic radiation. This means that only one specific wavelength or frequency of light can be transmitted through the cavity at a time.
A different single-mode cavity refers to any other type of cavity that also supports only one mode of electromagnetic radiation, but may have different properties or characteristics. For example, a Fabry-Perot cavity is a type of single-mode cavity, but it differs from other single-mode cavities in terms of its design and mode structure.
A single-mode cavity supports only one mode of electromagnetic radiation, while a multi-mode cavity can support multiple modes at the same time. This means that a single-mode cavity has a narrower bandwidth and more precise wavelength selectivity, while a multi-mode cavity has a wider bandwidth and can transmit a broader range of wavelengths.
Single-mode cavities are commonly used in laser technology, fiber optics, and other optical systems that require precise control over the wavelength of light. They are also used in research and scientific experiments to study the properties of light and its interactions with matter.
Single-mode cavities are typically created by constructing a resonant cavity with dimensions that correspond to the desired wavelength of light. This can be achieved through various methods such as using mirrors, optical fibers, or microcavities. In some cases, single-mode cavities can also be created by manipulating the properties of the light source itself, such as in a single-mode laser.