High Power and Stable High Coupling Efficiency (66%) Superluminescent Light Emitting Diodes by Using Active Multi-Mode Interferometer

Zang, Zhigang; Mukai, Kazuo; Navaretti, Paolo; Duelk, M.; Vélez, Christian; Hamamoto, Kiichi

doi:10.1587/transele.e94.c.862

Cited by 79 publications

(18 citation statements)

References 7 publications

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“…The advent of low-coherence light sources, such as superluminescent diode (SLD) 4,[16][17][18] and amplified spontaneous emission (ASE) light sources, 4 permit the elimination of Rayleigh backscattering and Kerr effect errors. An ASE light source is used considering the stable wavelength with temperature sensitivities nearly two orders of magnitude smaller than a SLD.…”

Section: Measurement Setupmentioning

confidence: 99%

New measurement method for eigen frequency of a fiber optic gyroscope

Yang

2013

Opt. Eng

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Abstract. Eigen frequency is a very important parameter in a fiber optic gyroscope (FOG). To establish an accurate measurement of eigen frequency, we propose a new measurement method based on employing the square-wave, over-bias modulation with double eigen frequency. We investigate the proposed method both experimentally and theoretically. Experimental results show the measurement accuracy of eigen frequency is better than AE5 Hz, which satisfies the eigen frequency measurement of most FOGs. A theoretical model of the method gives a good explanation of the experimental results. The method is simple, low-cost, and easy to implement. In addition, it can greatly improve the accuracy of the eigen frequency measurement without needing additional hardware for existing gyro systems. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Measurement Setupmentioning

confidence: 99%

New measurement method for eigen frequency of a fiber optic gyroscope

Yang

2013

Opt. Eng

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“…For instance, by using the Goos-Hanchen shift to design high-power superluminescent diodes of up to 115 mW, a low thermal resistance of 4.83 K∕W in active multimode interferometer (active-MMI) superluminescent light-emitting diodes (SLEDs) and a high coupling efficiency of 66% of the fiber-coupled power of active-MMI SLEDs into single-mode fiber have been obtained. [6][7][8] However, I do not think that the problem of the evanescent light wave has been solved satisfactorily. According to the electromagnetic wave theory, an evanescent wave of light should decay exponentially along the z direction and move forward infinitely in the x direction.…”

Section: Introductionmentioning

confidence: 99%

Evanescent wave of a single photon

Li¹

2013

Opt. Eng

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Abstract. A photon model is proposed, and the parameter equations of the photon are obtained. This model can explain the polarization, total reflection, evanescent wave, and Goos-Hanchen shift of a single photon. The evanescent waves of photons with different frequencies are refractively dispersed. The Goos-Hanchen shift is dependent on the difference between the two refractive indices of media, the incident angle, and the frequency of the photon. According to this model, an evanescent wave of light does not decay exponentially along the z direction and does not propagate along the x direction infinitely. The laws of refraction and reflection for a single photon can be derived. The refractive dispersion of light can be explained. According to this model, every photon is polarized. Polarization is the intrinsic nature of the photon. The motion of a single photon is either clockwise or counterclockwise. The so-called unpolarized light refers to light that consists of an equal number of photons with clockwise motion and counterclockwise motion. The trajectories of two photons with the same frequency but opposite spiral directions are mirror-image isomers. They cannot be superimposed upon each other. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…We consider Gaussian-beams because they are the lowest-degree mode and most desirable type of beams obtained from all stable optical resonators [1,22]. In addition, they have attracted numerous applications in the semiconductor waveguides when designing the high power and wide-spectrum superluminescent light-emitting diodes (SLEDs) [23,24], and low repetition rate broadband high energy and peak power fiber amplifiers [25] among other applications. In this study we provide an analytic expression for spatial coherence radius derived from the Gaussian-beam wave structure function (WSF) based on non-Kolmogorov turbulent atmosphere for a horizontal path.…”

Section: Introductionmentioning

confidence: 99%