Monolithic integration of 1.3-/spl mu/m Stark-ladder electroabsorption waveguide modulators with multimode-interference splitters

Harrison, Lorna J.; Tayag, Tristan J.; Simonis, George J.; Stead, Michael; Euliss, Gary W.; Leavitt, Richard P.

doi:10.1109/68.849075

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…1). Therefore, the relative group delay induced by a linearly CFBG written in a HiBi fiber (⌬ ϭ x Ϫ y ) is calculated using the following expression: Expression (2) shows that the dynamic tuning of the induced PMD can be made by adjusting the birefringence of the fiber [4] or by adjusting the dispersion of the grating. The adjustment of the dispersion can be made by applying a linear temperature gradient to a uniform FBG.…”

Section: Theorymentioning

confidence: 99%

“…Based on the diffraction theory, if only one electrically small hole exists, the transmission power will be very small since it is mostly reflected by the PEC plane, and the emitted beam is very broad because the EM waves are diffracted to all directions uniformly. Recently, some approaches have been developed to enhance the transmission power with a narrow beam [2][3][4][5]. In [2][3][4], surface resonance formed by the periodic corrugations is the substantial reason to cause such magic phenomenon.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, some approaches have been developed to enhance the transmission power with a narrow beam [2][3][4][5]. In [2][3][4], surface resonance formed by the periodic corrugations is the substantial reason to cause such magic phenomenon. Different from [2][3][4], LHM is introduced to achieve even better performance in [5].…”

Section: Introductionmentioning

confidence: 99%

“…In [2][3][4], surface resonance formed by the periodic corrugations is the substantial reason to cause such magic phenomenon. Different from [2][3][4], LHM is introduced to achieve even better performance in [5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tunable polarization optical delay line based on a linear chirped fiber Bragg grating

Nogueira

Rocha

Pinto

2006

Micro & Optical Tech Letters

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A new technique for inducing relative group delays between the orthogonal transversal propagation modes in a single mode fiber is presented. It is based on a tunable linear chirp induced in a Bragg grating written in a highly birefringent fiber by thermal means. The method can induce a relative delay over a wide range, making it possible for use in a polarization mode dispersion compensator. Figure 3(a) Reflection spectra for different temperature gradients applied to the grating (b) Relative group delay measured at 1544.75 nm for different temperature gradients Adjustable compensation of polarization mode dispersion using a high-birefringence nonlinearly chirped fiber Bragg grating, ABSTRACT: Many amazing properties of a novel electromagnetic (EM) structure, consisting a conducting grating backed with a lefthanded material (LHM) slab, are studied. High-directivity, high-power emission and narrow-beam scanning can be easily realized when this structure acts as an antenna. Simultaneously, if it works as an imaging system, extremely high resolution can also be obtained with the unique EM behaviors of the LHM. Proper usage of surface waves on apertures opened in the conducting screen makes this structure possess such attractive capabilities. In order to investigate such phenomena, a more general EM model is first developed through the equivalence principle, and then the method of moments is implemented to obtain the interesting results. All these amazing properties are clearly observed through the numerical results. Figure 1A conducting grating immersed in multiple-layered media, where an arbitrary electric source is located in Region R lN

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Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tunable polarization optical delay line based on a linear chirped fiber Bragg grating

Nogueira

Rocha

Pinto

2006

Micro & Optical Tech Letters

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“…For these reasons, MMI couplers are used more often than directional couplers for practical applications [2][3][4][5]. The wavelength filters that combine/separate wavelengths are one of many MMI coupler applications [6][7].…”

Section: Introductionmentioning

confidence: 99%

Pseudo-self-imaging phenomenon in multimode waveguide and its application

Hong

Sun

2006

Proceedings of SPIE

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The self-image profiles in a multimode waveguide can be estimated from the phase relations of the guided-modes. However, in MMI theory, the propagation constants of each guided-mode are defined as a perfectly confined condition. Because of the effect of the Goos-Hänchen shift, there are large phase differences for each guided-mode between the predictions of MMI theory and the actual phenomena. Because the relative phases of the guided-modes are not the same as the theoretical ones in a multimode waveguide, it is possible that an undefined self-image can be produced. In this paper, such a phenomenon is called the 'pseudo-self-imaging phenomenon'. This phenomenon can be observed in both the simulation and the experimental results. The excess loss has been measured, and the results are the same as -0.5dB for both the 1st 0-dB self-image and the 1st pseudo-self-image. These results may have been occurred by the phase mismatch of the guided-modes. The extinction ratios are also measured, and the results are 15.5dB for the 0-dB selfimage and 16.2dB for the pseudo-self-image. From the result, it is shown that the pseudo-self-image is formed after the 0-dB self-image and the pseudo-self-images' intensity can be higher then the 0-dB self-images.

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Experimental study of the self‐imaging phenomenon with weak‐guiding condition

Hong

Lee

2006

Micro & Optical Tech Letters

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patterns in this case. By investigating the change of the antenna's performance, such as the impedance bandwidth, radiation patterns, and gains, due to the laptop housing, the design procedure of laptop antennas in a real situation can be further simplified. These structural features and electrical properties are very attractive for WLAN applications.ABSTRACT: This paper investigates a self-imaging phenomenon in a multimode interference (MMI) coupler. In the experiment, different selfimages which are undefined in MMI theory are observed. This undefined self-image is named the "pseudo-self-image " (PSI) as a matter of convenience. The characteristics of both the single self-image (0-dB selfimage: 0-dB SI), which is defined in MMI theory, and the PSI are compared and analyzed through simulation and experimentation to estimate the applicability of the PSI. Results show that the PSI has an imaging period the same as the 0-dB SI, and the excess loss and the extinction ratio of the PSI improve more than those of the 0-dB SI as the imaging period increases. ABSTRACT: A new technique for inducing relative group delays between the orthogonal transversal propagation modes in a single mode fiber is presented. It is based on a tunable linear chirp induced in aBragg grating written in a highly birefringent fiber by thermal means. The method can induce a relative delay over a wide range, making it possible for use in a polarization mode dispersion compensator.

show abstract

Monolithic integration of 1.3-/spl mu/m Stark-ladder electroabsorption waveguide modulators with multimode-interference splitters

Cited by 8 publications

References 6 publications

Tunable polarization optical delay line based on a linear chirped fiber Bragg grating

Tunable polarization optical delay line based on a linear chirped fiber Bragg grating

Pseudo-self-imaging phenomenon in multimode waveguide and its application

Experimental study of the self‐imaging phenomenon with weak‐guiding condition

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