Publication

Study of polarisation switch in a three-contacts vertical-cavity surface-emitting laser

Jean-François Carlin
2003
Conference Papers

Abstract

We report a novel three-contacts vertical-cavity surface-emitting laser (VCSEL) for use in polarization-sensitive optical applications. The device consists in two vertical optically active cavities, coupled by a common min-or. We demonstrate that one can independently choose both the power - through the Current in the first cavity - and the polarization state of the output beam - through the bias applied to the second cavity. The control of the polarization state is performed with a control of voltage required in the range -2V to 0V. Within this interval the structure exhibits bistable behaviour.

Official source

https://infoscience.epfl.ch/entities/publication/fb48700b-e498-41f6-ba47-ed1773bb2e5a

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Jean-François Carlin
2003
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/fb48700b-e498-41f6-ba47-ed1773bb2e5a

About this result

Related concepts (18)

Polarization (physics)

Polarization (also polarisation) is a property of transverse waves which specifies the geometrical orientation of the oscillations. In a transverse wave, the direction of the oscillation is perpendicular to the direction of motion of the wave. A simple example of a polarized transverse wave is vibrations traveling along a taut string (see image); for example, in a musical instrument like a guitar string. Depending on how the string is plucked, the vibrations can be in a vertical direction, horizontal direction, or at any angle perpendicular to the string.

Vertical-cavity surface-emitting laser

The vertical-cavity surface-emitting laser, or VCSEL ˈvɪksəl, is a type of semiconductor laser diode with laser beam emission perpendicular from the top surface, contrary to conventional edge-emitting semiconductor lasers (also in-plane lasers) which emit from surfaces formed by cleaving the individual chip out of a wafer. VCSELs are used in various laser products, including computer mice, fiber optic communications, laser printers, Face ID, and smartglasses.

Laser diode

A laser diode (LD, also injection laser diode or ILD, or diode laser) is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction. Driven by voltage, the doped p–n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission.

Related publications (1)

Study of polarisation switch in a three-contacts vertical-cavity surface-emitting laser

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Decoding chirality at the nanoscale with momentum-space polarimetry