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Keywords beginning with R

See also our glossary!

A short explanation for a term is also displayed, when you move the mouse cursor on an article keyword in the list.

(Acronyms: see below)

r.m.s. values → power spectral density

Rabi frequency → Rabi oscillations

Rabi oscillations

radiance → brightness

radiant sensitivity → responsivity

radiation-balanced lasers

radiation modes → cladding modes

radiative lifetime

radioluminescence → luminescence

radiometry → optical metrology

radius of laser beam → beam radius

Raman amplifiers

Raman effect → Raman scattering

Raman fiber lasers → Raman lasers

Raman gain

Raman lasers

Spotlight 2012-03-12: New Raman lasers

Raman scattering

Spotlight 2010-03-03: Thresholds for nonlinear effects in fiber amplifiers

Raman self-frequency shift → solitons

Raman spectroscopy → spectroscopy

range finding → distance measurements with lasers

rare-earth-doped fibers

Spotlight 2016-05-12: Measurement of absorption spectra of active fibers: not as easy as one might think!

rare-earth-doped gain media

Spotlight 2014-06-27: Shortages of rare earth materials – a problem for photonics?

rate equation modeling

Spotlight 2008-10-20: Rate equations – an example for stiff sets of differential equations

rational harmonic mode locking → active mode locking

ray transfer matrix → ABCD matrix

Rayleigh length

Rayleigh scattering

reabsorption in gain media → four-level and three-level gain media

reciprocity method

recirculating fiber loops

recoil limit

red–green–blue sources → RGB sources

red lasers

reference cavities

reflection coefficient of an interface → Fresnel equations


refractive index

regenerative amplifiers

regenerative mode locking → active mode locking

relative intensity noise

relaxation oscillations

remote ranging → distance measurements with lasers

repetition rate → pulse repetition rate

residual jitter → timing jitter

resonant cavity → optical resonators

resonant frequency doubling

resonant second-harmonic generation → resonant frequency doubling

resonator bandwidth → resonator modes

resonator design

Spotlight 2011-06-10: Are compact resonators more stable?

resonator mode spacing → free spectral range

resonator modes

resonators → optical resonators


retarders → waveplates

return loss

RGB sources

ring lasers

ring resonators → optical resonators

rod-in-tube method → fiber fabrication

rod lasers

rotating slit → beam profilers

rubber band model → frequency combs

ruby lasers → chromium-doped gain media

rugate filters

Acronyms beginning with R

RBL = radiation-balanced laser

RGB sources = red–green–blue sources

RIN = relative intensity noise

… and if you need any more help on such topics, consider to use the consulting services of RP Photonics Consulting GmbH! There is a variety of various services available in topical areas such as lasers, amplifiers, nonlinear optics, fiber optics, ultrashort pulses, multilayer mirrors, noise and fluctuations, and other topics in photonics and optoelectronics.