Antireflection-coated angled facet design

Reed, M.; Benson, T.M.; Kendall, P.C.; Sewell, P.

doi:10.1049/ip-opt:19960597

Cited by 28 publications

(8 citation statements)

References 15 publications

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“…On the other hand, the results obtained using the third-order Taylor in excellent agreement with those obtained using the FSRM [9]. For a TM 0 mode excitation, the variation of the reflected power of the fundamental TM 0 mode with H obtained using the present finite-element approach employing the first-, second-and third-order Taylor's expansions and the FSRM [9] are shown in Figure 4.9. Again, this figure shows clearly that the use of the finite-element approach with a third-order Taylor's expansion gives reflected power results that are almost indistinguishable from those obtained using the FSRM [9].…”

Section: Laser-air Facetsupporting

confidence: 69%

“…The schematic diagram of the structure is shown in Figure 4.7. For a TE 0 mode launched, the variation of the reflected power It may be observed from this figure that the results of this approach converge very rapidly with those obtained using the FSRM [9]. For a TE 0 mode launched, the variation of the reflected power It may be observed from this figure that the results of this approach converge very rapidly with those obtained using the FSRM [9].…”

Section: Laser-air Facetsupporting

confidence: 52%

“…techniques [8] or the free-space radiation mode (FSRM) method [9], to solve for the reflection and transmission coefficients. In this class of methods, the solution accuracy is enhanced as more guided and radiation modes are included in the field summation.…”

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confidence: 99%

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Bidirectional Beam Propagation Method

Obayya

2010

Computational Photonics

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In this chapter, the formulation of the finite-element solution for optical waveguide discontinuity problems is presented [1]. The validity and the numerical precision of the proposed method are evaluated through the analysis of three discontinuity problems, including a junction between two different waveguide sections, a laser-air interface and a laser angled facet. In addition, a numerically efficient scalar analysis of optical fibre facet problems based on the finite-element scheme is included [2] and the simulation results of dealing with various numerical uncoated and coated optical fibre facet problems will be detailed. Optical Waveguide Discontinuity ProblemOptical waveguide discontinuities play a very important role in the design of optical communication systems, and are quite often faced in situations such as butt-coupled waveguides, waveguide ends, laser facets and antireflection coatings [3][4][5]. Therefore, an accurate and efficient method for the solution of optical waveguide discontinuities is highly desirable. There are a number of methods proposed in the literature for the analysis of optical waveguide discontinuity problems. These methods can be classified, according to their solution strategy, into two groups. In the first group, the total field on either side of the discontinuity is made up as a weighted summation of all guided and radiation modes. Then, the continuity of the tangential electric and magnetic fields at the discontinuity plane is enforced using, for example, the least squares boundary residual (LSBR) [6], a combination of the finite elements and method of lines (FE-MoL) [7], the finite-element method (FEM) with analytical Computational PhotonicsSalah Obayya

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Section: Laser-air Facetsupporting

confidence: 69%

Section: Laser-air Facetsupporting

confidence: 52%

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Bidirectional Beam Propagation Method

Obayya

2010

Computational Photonics

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“…With the view to simplify the analysis, 2D Fourier transform is applied to all field components in equations (5,6). In order to solve the system (4)-(5) for the modal reflectivities R,,, the radiation field can be expressed as …”

Section: Theorymentioning

confidence: 99%

“…Very low facet reflectivities are most commonly achieved using layered antifreflection coatings (AR) or angling the facet [2], 133. The problem of design and optimisation of optical waveguide facets is now well elaborated for rectangular waveguides [4], [5], including scalar as well as vector analysis [6]. Optical fibre facets were modelled in scalar approximation considering only guided mode diffraction at the end or 'fibres [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Full vector analysis of optical fibre facet

Vorgul

Vuković

Sewell

et al.

International Conference on Mathematical Methods in Electromagnetic Theory

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The normal facet full vector problem is accurately solved for a vector circular optical fibre with a high efficient algorithm. The Free Space Radiation Mode (FSRM) method is used to investigate the facet reflectivity for a set of incident modes having all six components of electromagnetic field dependent on all three spatial coordinates. The analysis yields a simple integral for the reflection coefficient for each mode, which makes calculations fast and reliable. Vector results for the reflectivity of the fundamental EHll mode are compared with the scalar ones showing significant quantitative differences between them ( 4 0 dB).

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Semiconductor Optical Amplifiers

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Antireflection-coated angled facet design

Cited by 28 publications

References 15 publications

Bidirectional Beam Propagation Method

Bidirectional Beam Propagation Method

Full vector analysis of optical fibre facet

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