λ/4-shifted InGaAsP/InP DFB lasers

Utaka, Katsuyuki; Akiba, S.; Sakai, Kenji; Matsushima, Yuichi

doi:10.1109/jqe.1986.1073089

Cited by 127 publications

(24 citation statements)

References 29 publications

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“…The principle of the phase shift was demonstrated by Alfemess et al [2] in periodic structures made from semiconductor materials, where a phase shift was introduced by etching a space at the center of the device. This forms the basis of the single-mode phase-shifted semiconductor DFB laser [3]. A similar device may be constructed in optical fibers using Manuscript various techniques.…”

Section: Introductionmentioning

confidence: 99%

Optical Inclinometer Based on a Phase-Shifted Bragg Grating in a Taper Configuration

Moura

Silva

Becker

et al. 2014

IEEE Photon. Technol. Lett.

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A simple optical inclinometer based on a phaseshifted Bragg grating in a taper configuration is proposed. Two phase-shifted fiber Bragg gratings were fabricated using a DUV femtosecond laser technique in the taper region, with taper waist diameters of 30 μm and 50 μm. Both sensing heads were compared based on their response to angle and strain. Whereas the higher diameter sensor yielded a higher sensitivity to curvature (23.8 ± 0.3 pm/degree), the lower diameter one was more sensitive to strain (8.94 ± 0.04 pm/με).

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Section: Introductionmentioning

confidence: 99%

Optical Inclinometer Based on a Phase-Shifted Bragg Grating in a Taper Configuration

Moura

Silva

Becker

et al. 2014

IEEE Photon. Technol. Lett.

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show abstract

“…The principle of the phase shift was demonstrated by Alfemess et al [2] in periodic structures made from semiconductor materials, where a phase shift was introduced by etching a space at the centre of the device. This forms the basis of the single-mode phase-shifted semiconductor DFB laser [3]. A similar device may be constructed in optical fibres using various techniques.…”

Section: Introductionmentioning

confidence: 99%

Optical inclinometer based on phase-shifted Bragg grating in a taper configuration

Moura¹,

Silva²,

Becker³

et al. 2013

SPIE Proceedings

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“…Several methods to realize the asymmetric structure were proposed:1) λ/4-shift position is moved from the center of the DFB active region [2],2)the coupling coefficients in both regions divided by the λ/4-shift are changed separately [3],and 3)the reflectivity of both end facets are made highly asymmetric [4]. But, the cost of fabricating such complex structures is high owning to the requirement of the nanometer precision control.…”

Section: Introductionmentioning

confidence: 99%

A novel sampling Bragg grating for DFB laser

Zheng

et al. 2013

2013 12th International Conference on Optical Communications and Networks (ICOCN)

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Based on reconstruction equivalent chirp (REC) technology, we propose a special structure for distributed feed-back (DFB) lasers realized by changing the duty cycle of one side in sampling Bragg grating, thus the equivalent apodization is introduced in this side , resulting into the magnitude of the equivalent index modulation is varied and smaller than the other side. As a conventional equivalent π phase-shift sampling Bragg grating (SBG),this proposed structure also introduces an equivalent π phase-shift into both its ±1storder channel. Combined with the conventional equivalent π phase-shift, the sampling technique can be used to design and fabricate Semiconductor or fiber lasers conveniently.

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λ/4-shifted InGaAsP/InP DFB lasers

Cited by 127 publications

References 29 publications

Optical Inclinometer Based on a Phase-Shifted Bragg Grating in a Taper Configuration

Optical Inclinometer Based on a Phase-Shifted Bragg Grating in a Taper Configuration

Optical inclinometer based on phase-shifted Bragg grating in a taper configuration

A novel sampling Bragg grating for DFB laser

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