A lensed-fiber coupling scheme utilizing a graded-index fiber and a hemispherically ended coreless fiber tip

Shiraishi, Kazuyuki; Ohnuki, Hideo; Hiraguri, N.; Matsumura, K.; Ohishi, Iwao; Morichi, H.; Kazami, H.

doi:10.1109/50.554388

Cited by 38 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The principle of an optical coupler by GFL fused to SFMs is to control the modal field diameter of fibers to optimize the coupling arrangement by adjusting the length of GFL. Then, the GFL acts as a spot size controller of the modal field of fibers by the scaling operation based on imaging properties of the GRIN medium facilitating the light coupling between SMFs [25][26][27][28][29][30][31][32][33][34][35][36]. Important advantages of fusion splicing over free-space coupling include low-loss coupling, compactness, robust alignment and the absence of exposed optical surfaces that can be damaged or contaminated.…”

Section: Grin Fiber Lensesmentioning

confidence: 99%

Design of GRIN optical components for coupling and interconnects

Gómez-Reino¹,

Pérez²,

Bao³

et al. 2008

Laser & Photonics Reviews

View full text Add to dashboard Cite

This paper reviews the design of some optical systems for coupling and interconnection by GRIN components. The optical systems designed with these components are based on imaging and transforming properties of such components to carry out specific functions. First of all, a brief description of light propagation through GRIN materials will be given. After that, a device to couple light by a GRIN fiber lens into fibers of different core sizes with low loss is described. The coupling efficiency as well as the coupling loss are studied versus variation of the GRIN fiber lens length and the refractive-index profile of the coupler. The design of crossover and parallel interconnects by using a GRIN planar structure will be presented. The optical analysis includes the PSF for describing the performance of the device and the SBP for estimating the numbers of channels that can be handled. The dependence of the number of channels on the wavelength of light and the transverse aperture of the planar interconnect is shown.Spherical GRIN materials: Luneburg (top) and Maxwell's fisheye (bottom) lenses.

show abstract

Section: Grin Fiber Lensesmentioning

confidence: 99%

Design of GRIN optical components for coupling and interconnects

Gómez-Reino¹,

Pérez²,

Bao³

et al. 2008

Laser & Photonics Reviews

View full text Add to dashboard Cite

show abstract

“…Very recently, a new direction in lensed fiber configuration has emerged to achieve low loss and long working distance (the air gap between LD and fiber) characteristics. [11][12][13] In this connection, a hyperbolic end shape on a graded index fiber is proposed for coupling with SMF (Ref. 14).…”

Section: Introductionmentioning

confidence: 99%

Coupling of a laser diode to single mode circular core graded index fiber via hyperbolic microlens on the fiber tip and identification of the suitable refractive index profile with consideration for possible misalignments

Mukhopadhyay¹,

Sarkar

2011

Opt. Eng

View full text Add to dashboard Cite

With an aim to explore the suitable refractive index profile for maximum coupling, we present a theoretical investigation of coupling optics involving a laser diode and single mode circular core graded index fiber via a hyperbolic microlens on the fiber tip in absence and presence of any possible transverse and angular misalignments. By employing Gaussian field distributions for both the source and the fiber and also ABCD matrix for hyperbolic microlens under paraxial approximation, we formulate analytical expressions for the concerned coupling efficiencies. The investigations are performed for two different light-emitting wavelengths of 1.3 and 1.5 μm for such fibers with different profile exponents in refractive index profile. Further, it is observed that out of the studied refractive index profiles, the triangular index profile having the dispersionshifted merit comes out to be the most suitable profile to couple laser diode to single mode circular core graded index fiber for two wavelengths of practical interest. The analysis should find use in ongoing investigations for optimum launch optics for the design of hyperbolic microlens either directly on the graded index circular core single mode fiber tip or such fiber attached to single mode fiber to achieve a long working distance. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

show abstract

“…Another all-fiber solution was use of graded-index ͑GRIN͒ multimode fibers ͑MMFs͒. [7][8][9][10] Because of the quadratic index profile, the GRIN MMF acts as a lens element when an appropriate length is spliced to a single-mode fiber ͑SMF͒, and the technique can provide several advantages over a conventional bulk lens media such as a common fiber͞lens diameter, a stable fused fiber interface, and a small form factor. 7 Figure 1 schematically shows various fiber interconnecting techniques that use GRIN MMF.…”

Section: Introductionmentioning

confidence: 99%

All-fiber spot-size transformer for efficient free-space optical interconnecting devices

Kim

2003

Appl. Opt.

View full text Add to dashboard Cite

A new concatenated configuration of optical fibers is proposed to improve misalignment tolerance and working distance in a free-space optical interconnection. The structure is composed of three segments: a thermally expanded core fiber, a coreless silica fiber, and a claddingless graded-index fiber. A numerical analysis for the design of each fiber segment is performed completely, and the device characteristics are experimentally evaluated in terms of the tolerances for a 1-dB coupling-loss increment against longitudinal, transverse, and angular misalignments.

show abstract

A lensed-fiber coupling scheme utilizing a graded-index fiber and a hemispherically ended coreless fiber tip

Cited by 38 publications

References 11 publications

Design of GRIN optical components for coupling and interconnects

Design of GRIN optical components for coupling and interconnects

Coupling of a laser diode to single mode circular core graded index fiber via hyperbolic microlens on the fiber tip and identification of the suitable refractive index profile with consideration for possible misalignments

All-fiber spot-size transformer for efficient free-space optical interconnecting devices

Contact Info

Product

Resources

About