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Finite-difference full-vectorial bea...

He, Yongzhi.

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Finite-difference full-vectorial beam propagation method development and microlens design for fiber to laser diode coupling.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Finite-difference full-vectorial beam propagation method development and microlens design for fiber to laser diode coupling./
作者:	He, Yongzhi.
面頁冊數:	73 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6703.
Contained By:	Dissertation Abstracts International66-12B.
標題:	Physics, Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3198639
ISBN:	9780542441516

Finite-difference full-vectorial beam propagation method development and microlens design for fiber to laser diode coupling.
He, Yongzhi.

Finite-difference full-vectorial beam propagation method development and microlens design for fiber to laser diode coupling. - 73 p.

Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6703.

Thesis (Ph.D.)--University of California, Irvine, 2005.

The first part of this work is related to the development of the finite-difference full-vectorial beam propagation method (FD-FV-BPM), which is one of the most popularly used simulation tools for optical waveguides and circuits design. Firstly, the general FD formula of the FD-FV-BPM is reviewed and demonstrated for computing the fundamental modes of an index-guiding photonic crystal fiber. The numerical accuracy and convergence behavior of the FV-FD-BPM for modal index calculation are detailedly investigated. Secondly, an improved FD-FV-BPM is introduced with a dramatic improvement in accuracy compared to the conventional methods. This method is developed based on the generalized Douglas scheme and novel FD formulas for the cross-coupling terms. The much higher accuracy is demonstrated by testing it on a strongly-guiding rib waveguide.

ISBN: 9780542441516Subjects--Topical Terms:

1018756
Physics, Optics.

Finite-difference full-vectorial beam propagation method development and microlens design for fiber to laser diode coupling.
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245 1 0 $a Finite-difference full-vectorial beam propagation method development and microlens design for fiber to laser diode coupling.
300 $a 73 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6703.
500 $a Chair: Frank G. Shi.
502 $a Thesis (Ph.D.)--University of California, Irvine, 2005.
520 $a The first part of this work is related to the development of the finite-difference full-vectorial beam propagation method (FD-FV-BPM), which is one of the most popularly used simulation tools for optical waveguides and circuits design. Firstly, the general FD formula of the FD-FV-BPM is reviewed and demonstrated for computing the fundamental modes of an index-guiding photonic crystal fiber. The numerical accuracy and convergence behavior of the FV-FD-BPM for modal index calculation are detailedly investigated. Secondly, an improved FD-FV-BPM is introduced with a dramatic improvement in accuracy compared to the conventional methods. This method is developed based on the generalized Douglas scheme and novel FD formulas for the cross-coupling terms. The much higher accuracy is demonstrated by testing it on a strongly-guiding rib waveguide.
520 $a The second part of this work is related to microlens design for fiber to laser diode coupling. Three types of microlens design are developed, i.e., modified wedge-shaped fiber lens design for single-mode fiber to 980nm laser diode coupling, graded-index fiber taper design for single-mode fiber to 1350nm or 1550nm laser diode coupling, and ideal microlens design for flatting the equiphase distribution of a Gaussian laser beam. The first two of the three types of microlens design are demonstrated with a nearly 90% efficiency for fiber to laser diode coupling, while the lens profiles are simple and easy to fabricate. The third type shows a perfect and high-accuracy microlens profile, which is capable of completely flatting the equiphase distribution of a Gaussian laser beam even under long working distance (>500mum). The ideal microlens design enables a nearly 100% efficiency of fiber to laser diode coupling. All the designs are based on the accurate wide-angle BPM simulation.
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