Výsledky vyhledávání - "Masashi Onishi"

Design Optimization of Hybrid Erbium-Doped Fiber Amplifiers for WDM Transmission Systems

Autor: Masayuki Shigematsu, Tomonori Kashiwada, Masayuki Nishimura, Koji Nakazato, Masashi Onishi, Motoki Kakui, Chie Fukuda

Publikováno v: Optical Fiber Technology. 3:123-133

For realizing wavelength-division multiplexing (WDM) transmission systems, one of the most important devices is the erbium-doped fiber amplifier (EDFA), which exhibits a flat gain, a high pumping efficiency, and a low noise figure (NF). To meet these

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b82f9f2fa075f31528c785801e335b9f
https://doi.org/10.1006/ofte.1997.0205

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Optical Fiber Amplifiers and Their Applications. Hybrid Er-Doped Fiber Amplifiers for Wavelength-Division Multiplexing Transmission Systems

Autor: Masayuki Shigematsu, Masashi Onishi, Motoki Kakui, Koji Nakazato, Tomonori Kashiwada, Masayuki Nishimura

Publikováno v: The Review of Laser Engineering. 25:158-163

Erbium-doped fiber amplifier (EDFA) featuring a spectrally flattened gain is considered to be one of the most important key devices for the wavelength-division multiplexing (WDM) transmission systems. For this purpose, we have developed hybrid EDFs c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ca86f2cc06bbd7b8a4a4332483cae75
https://doi.org/10.2184/lsj.25.158

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High-performance dispersion-compensating fibers

Autor: Yoichi Ishiguro, Tomonori Kashiwada, Masayuki Nishimura, Hiroo Kanamori, Masashi Onishi, Yasushi Koyano

Publikováno v: Fiber and Integrated Optics. 16:277-285

An optimum fiber structure for a practical dispersion-compensating fiber (DCF) has been explored theoretically and experimentally, taking dispersion, attenuation, bending loss characteristics, polarization mode dispersion, and nonlinear effects into

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a6d5f7120147f96a60e5da04d15931e0
https://doi.org/10.1080/01468039708221269

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Low-Distortion and High-Output Optical Power Amplifier for Analog Transmission Employing Hybrid Erbium-Doped Fiber Configuration

Autor: Tomonori Kashiwada, Masayuki Nishimura, Masashi Onishi, Masayuki Shigematsu, Motoki Kakui, Hisao Go

Publikováno v: Optical Fiber Technology. 2:195-200

We have proposed a novel configuration of erbium-doped fiber amplifier (EDFA) which realizes both a flat spectral gain and high output power for analog transmission. This EDFA uses hybrid EDF which consists of serially cascaded EDFs with different gl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::853a7f63a9aa3fed8bf9ccc6710a51a6
https://doi.org/10.1006/ofte.1996.0023

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Long-term reliability of Er-doped fibers in hydrogen environments

Autor: Hiroo Kanamori, Tomonori Kashiwada, Masayuki Nishimura, Masayuki Shigematsu, Motoki Kakui, Masashi Onishi, Yasushi Koyano

Publikováno v: Electronics and Communications in Japan (Part II: Electronics). 79:33-42

Accelerated tests of Er-doped fibers in hydrogen environments are carried out and as the evidence of their long-term utilization, the degradations in loss and gain are estimated. The hydrogen-induced loss-increase in Er-doped fibers with 0 to 3 perce

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b771822e781a63d763617d3327ccdcad
https://doi.org/10.1002/ecjb.4420790104

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2.5-Gbit/s Repeaterless Transmission Systems over Non-Dispersion-Shifted Fiber Using Directly Modulated DFB Laser and Dispersion Compensating Fiber

Autor: Masashi Onishi, Takatoshi Kato, Tomonori Kashiwada, Koji Nakazato, Masayuki Nishimura, Chie Fukuda, Motoki Kakui

Publikováno v: Optical Fiber Technology. 1:312-317

Feasibility of repeaterless transmission systems over non-dispersion-shifted fiber (NDSF) using directly modulated DFB lasers and dispersion compensating fiber (DCF) was examined. The transmission characteristics were investigated by simulations, con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af7029ab031e152f635171ae61042838
https://doi.org/10.1006/ofte.1995.1023

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Long-term measurement of optical frequencies using a simple, robust and low-noise fiber based frequency comb

Autor: Thomas R. Schibli, Atsushi Onae, Masaaki Hirano, Masataka Nakazawa, Hajime Inaba, Toshiaki Okuno, Kaoru Minoshima, Feng-Lei Hong, Hirokazu Matsumoto, Masashi Onishi, Yuta Daimon

Publikováno v: Optics express. 14(12)

We have developed a fiber-based frequency comb system consisting of a simple mode-locked fiber laser and a backward pumping amplifier combined with a highly nonlinear fiber with a short zerodispersion wavelength. As a result, the signal to noise rati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06083077ee9ff66cd7fc7679032c72df
https://pubmed.ncbi.nlm.nih.gov/19516688

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Bismuth-doped silicate glass fiber for ultra-broadband amplification media

Autor: Masashi Onishi, Junji Iihara, Tetsuya Haruna

Publikováno v: SPIE Proceedings.

Bismuth (Bi) -doped silicate glass for future photonics applications was proposed by Y. Fujimoto et al . in 2001 [1]. And its broadband fluorescence characteristic at 1.3um band was demonstrated for the first time. From this report, several studies s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::26fa51e927af5b241bfcc02e66a6b536
https://doi.org/10.1117/12.688684

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