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Technical Articles

What is a Dichroic Mirror?

A dichroic mirror, also known as a dual-band mirror, dual-wavelength mirror, or dichroic reflector, is an optical mirror with diff... read more
What is Light Diffusion?

Light diffusion is the scattering and spreading of light in various directions when it encounters an uneven or rough surface or pa... read more
What is a Retroreflector?

A retroreflector is an optical device designed to reflect light back toward its source with minimal scattering. Unlike mirrors, le... read more
What is a Fabry-Perot (FP) Laser Diode?

The Fabry-Perot (FP) laser diode is a type of laser diode that utilizes a Fabry-Perot resonant cavity to control the modes of oper... read more
What is Laser-Induced Fluorescence (LIF)?

Laser-Induced Fluorescence (LIF) is an optical spectroscopic method in which a laser is employed to excite a sample, and a photode... read more
What are Evanescent Waves?

Evanescent waves are electromagnetic waves that exist only within a very short distance from a boundary or interface between two m... read more

What is Population Inversion?
Population inversion is the process by which a laser medium is excited to create more atoms in higher energy state than in the gro... read more
What is a V-number?
The V-number, represented by V, is a dimensionless parameter used in optical fiber and waveguide technology. It is calculated as t... read more
What are Fiber Bending Losses?
The strength of optical signals transmitted through a fiber can be degraded due to various factors like absorption, scattering, be... read more
What are Spatial Coherence and Temporal Coherence?
Coherence is the measure of the relation between phases observed at distinct points on a wave, including both temporal and spatial... read more
What is Light Diffusion?
Light diffusion is the scattering and spreading of light in various directions when it encounters an uneven or rough surface or pa... read more
What is Lambert's Cosine Law?
Lambert’s cosine law states that the radiant intensity from the ideal diffusely reflecting surface and cosine of the angle &... read more

What is Red Light?
Red light is a part of the electromagnetic spectrum with wavelengths typically ranging from approximately 650 nm - 700 nm (or equi... read more
What is Green Light?
Green light is a light in the electromagnetic spectrum found within wavelengths ranging from approximately 500 nm - 570 nm (or equ... read more
What is Yellow Light?
Yellow light is a distinct segment of the visible light spectrum, with wavelengths ranging from approximately 570 nm - 600 nm (570... read more
What is Orange Light?
Orange lightis a part of the electromagnetic spectrum that occupies wavelengths between approximately 600 nm - 650 nm (or equivale... read more
What is Raman Spectroscopy?
Raman spectroscopy is a spectroscopic technique that utilizes scattered light to probe the vibrational energy modes present within... read more
What is Violet Light?
Violet light is the segment of the visible light spectrum that occupies the wavelengths ranging from approximately 380 nm - 450 nm... read more