Questions & Answers on Lasers

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What is Population Inversion?

Lasers

Editor - GoPhotonics

Feb 15, 2021

Population inversion is the process by which a laser medium is excited to create more atoms in higher energy state than in the ground state. This allows stimulated emission to happen and produces a co...read more

What is Spectral Width of a Laser?

Lasers

Editorial Team - GoPhotonics

May 13, 2022

The Spectral Width is the output wavelength range of a laser. Lasers are not completely monochromatic i.e. they do not produce a single wavelength of light and so the laser output is generally a range...read more

What is the Duty Cycle of a Laser?

Lasers

Editorial Team - GoPhotonics

May 13, 2022

Duty Cycle is a term most often used for pulsed lasers. It defines the fraction of time for which the laser output is available. In other words, it is the maximum amount of time that the laser can rem...read more

What is a Quantum Well Laser?

Lasers

Editorial Team - GoPhotonics

Feb 20, 2023

A Quantum well laser is a type of semiconductor laser where the thickness of the active region is very narrow. The thickness of the active region determines the wavelength of the light emitted by...read more

Explain the Principle of Laser Amplification?

Lasers

Editor - GoPhotonics

Feb 15, 2021

Laser amplification is a process by which a weak laser signal is amplified through the stimulated emission of photons in a gain medium. This process is used in many applications such as telecommunicat...read more

What is a Fabry-Perot (FP) Laser Diode?

Lasers

Editorial Team - GoPhotonics

Jul 17, 2023

The Fabry-Perot (FP) laser diode is a type of laser diode that utilizes a Fabry-Perot resonant cavity to control the modes of operation and achieve wavelength stability. FP laser cavity functions as a...read more

What is Mode Locking in Lasers?

Lasers

Editorial Team - GoPhotonics

Feb 10, 2023

Mode Locking is a technique to generate ultra-short pulses in the order of picoseconds (10-12) or femtoseconds (10-15). Lasers that generate a train of periodic ultra-short pulses are called mode-lock...read more

What is Threshold Current in Lasers?

Lasers

Editorial Team - GoPhotonics

May 13, 2022

Threshold Current in a laser is the minimum current required by the input pump to generate photons that get converted into a laser output.For a medium to be able to amplify incident radiation, the sta...read more

What are Nd:Glass Lasers?

Lasers

Editorial Team - GoPhotonics

Dec 29, 2022

Nd:Glass laser is a four-level solid-state laser. The output wavelength of Nd:glass lasers is 1.062 µm (for silicate glasses) and 1.054 µm (for phosphate glasses) which lies in the near-in...read more

What is Spectral Hole Burning?

Lasers

Editorial Team - GoPhotonics

Feb 6, 2023

Spectral hole burning is the frequency selective bleaching of the absorption spectrum of an optically active material. It is a phenomenon that occurs in certain types of optical materials such as glas...read more

What is a Laser?

Lasers

Editor - GoPhotonics

Feb 15, 2021

LASER stands for Light Amplification by Stimulated Emission of Radiation. In 1960, the first successful laser was demonstrated by Theodore Maiman using a ruby crystal. The light produced by the l...read more

What are Distributed Feedback (DFB) Lasers?

Lasers

Editorial Team - GoPhotonics

Nov 4, 2022

A Distributed Feedback (DFB) laser is a laser device whose active medium consists of a repeating corrugated structure. The corrugated structure is a periodic variation of the refractive index and thus...read more

What is Full Width at Half Maximum (FWHM)?

Lasers

Editorial Team - GoPhotonics

Oct 27, 2022

FWHM or Full Width at Half Maximum is the width of the output spectrum of a light source measured at half of its maximum amplitude. It is measured between the point on the output spectrum curve w...read more

What is Power Conversion Efficiency in a Laser?

Lasers

Editorial Team - GoPhotonics

May 13, 2022

Power Conversion Efficiency in general is a term that tells us how much energy is converted from one form to another. In the case of lasers, power conversion efficiency tells us the amount of electric...read more

What are Distributed Bragg Reflector (DBR) Lasers?

Lasers

Editorial Team - GoPhotonics

Mar 20, 2023

A Distributed Bragg Reflector (DBR) Laser is a semiconductor laser with a p-n junction as an active medium and contains one or two Bragg reflectors on each side of the active region. Bragg reflectors ...read more

Questions & Answers on Lasers

Selected Topic :

What is Population Inversion?

What is Spectral Width of a Laser?

What is the Duty Cycle of a Laser?

What is a Quantum Well Laser?

Explain the Principle of Laser Amplification?

What is a Fabry-Perot (FP) Laser Diode?

What is Mode Locking in Lasers?

What is Threshold Current in Lasers?

What are Nd:Glass Lasers?

What is Spectral Hole Burning?

What is a Laser?

What are Distributed Feedback (DFB) Lasers?

What is Full Width at Half Maximum (FWHM)?

What is Power Conversion Efficiency in a Laser?

What are Distributed Bragg Reflector (DBR) Lasers?

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