Microlens fabrication on single-mode fibres for efficient coupling from laser diodes

Kotsas, A.; Ghafouri‐Shiraz, H.; Maclean, T.S.M.

doi:10.1007/bf00619610

Cited by 16 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this way it is possible to make microlenses at these fibre-ends which are used for efficient coupling of light from laser diodes into the optical fibre [111][112][113]. Etching can also be used to decrease the diameter of an optical fibre, e.g.…”

Section: Etching Optical Fibres and Other Optical Devicesmentioning

confidence: 99%

Wet chemical etching of silicate glasses in hydrofluoric acid based solutions

1993

View full text Add to dashboard Cite

The etching of silicate glasses in aqueous hydrofluoric acid solutions is applied in many technological fields. In this review most of the aspects of the wet chemical etching process of silicate glasses are discussed. The mechanism of the dissolution reaction is governed by the adsorption of the two reactive species: HF and HF 2 and the catalytic action of H + ions, resulting in the breakage of the siloxane bonds in the silicate network. The etch rate is determined by the composition of the etchant as well as by the glass, although the mechanism of dissolution is not influenced. In the second part of this review, diverse applications of etching glass objects in technology are described. Etching of SiO= and doped Si02 thin films, studied extensively for integrated circuit technology, is discussed separately.

show abstract

Section: Etching Optical Fibres and Other Optical Devicesmentioning

confidence: 99%

Wet chemical etching of silicate glasses in hydrofluoric acid based solutions

1993

View full text Add to dashboard Cite

show abstract

“…The optical signal is usually launched into the optical fibre via a micro-lens so as to maximize the coupling efficiency between the optical source and the optical fibre [20]. Often the launched power P 0 , is expressed in dBm units (i.e.…”

Section: Optical Fibre Communication Systemsmentioning

confidence: 99%

Introduction to Optical Communications

Ghafouri‐Shiraz

Karbassian

2012

Optical CDMA Networks

View full text Add to dashboard Cite

The invention of the solid state ruby laser (acronym for light amplification by stimulated emission of radiation) in May 1960 [1] and the He-Ne gas laser [2] in December 1960 has led to some wide-ranging and very significant scientific and technological progress. This so-called 'discovery of the century', followed by the first use of semiconductor lasers [3][4][5] in communications, heralded the start of optical communications. The laser provided a powerful coherent light source together with the possibility of modulation at high frequency, and this opened up a new portion of the electromagnetic spectrum with frequencies many times higher than those commonly available in radio communication systems. In addition the narrow beam divergence of the laser made enhanced free-space optical transmission a practical possibility.Since optical frequencies are of the order of 100 THz, and information capacity increases directly with frequency bandwidth, the laser potentially offers a few order of magnitude increase in available bandwidth compared with microwave systems. Thus, by using only a small portion of the available frequency spectrum, a single laser could, in principle, carry millions of telephone conversations or TV channels.With the potential of such wideband transmission capabilities in mind, a number of experiments [6] using atmospheric optical channels were carried out in the early 1960s. These experiments showed the feasibility of modulating a coherent optical carrier wave at very high frequencies. However, the high cost of development for all the necessary components, and the limitations imposed on the atmospheric channel by rain, fog, snow and dust make such high-speed systems economically unattractive. However, numerous developments of free-space optical channel systems operating at baseband frequencies were in progress for earth-to-space communications [7,8].It soon became apparent that some form of optical waveguide was required. By 1963, bundles of several hundred glass fibres were already being used for small-scale Optical CDMA Networks: Principles, Analysis and Applications, First Edition. Hooshang Ghafouri-Shiraz and M. Massoud Karbassian.

show abstract

“…One can improve the signal-to-noise ratio and save energy through increasing the coupled light beam. During the past decades, many theoretical methods and experimental techniques were used to improve the coupling efficiency, such as a fiber array [11], cylindrical glass fiber [12], wedge-shaped fiber endface [13], combination lens [14], chemically etched self-centered diffracting element [15], and a microlens [16].…”

Section: Introductionmentioning

confidence: 99%

Coupling Efficiency of a Partially Coherent Radially Polarized Vortex Beam into a Single-Mode Fiber

Zhu

Wang

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

We study the problem of coupling partially coherent radially polarized (PCRP) vortex beams into a single-mode optical fiber. Using the well-known concept of the cross-spectral density (CSD) matrix, we derive a general expression for the coupling efficiency of the partially coherent beam into a single-mode fiber. We adopt PCRP vortex beams for incident beams and use our general results to discuss the effects of the coherence, topological charge, and wavelength on the coupling efficiency of an optical beam focused onto a single-mode fiber with a lens. Our results should be useful for any application that requires coupling of partially coherent beams into optical fibers.

show abstract

Microlens fabrication on single-mode fibres for efficient coupling from laser diodes

Cited by 16 publications

References 29 publications

Wet chemical etching of silicate glasses in hydrofluoric acid based solutions

Wet chemical etching of silicate glasses in hydrofluoric acid based solutions

Introduction to Optical Communications

Coupling Efficiency of a Partially Coherent Radially Polarized Vortex Beam into a Single-Mode Fiber

Contact Info

Product

Resources

About