1.5 μm phase-shifted DFB lasers for single-mode operation

Sekartedjo, K.; Eda, N.; Furuya, Kazuhito; Suematsu, Y.; Koyama, Fumio; Tanbun‐Ek, T.

doi:10.1049/el:19840055

Cited by 125 publications

(14 citation statements)

References 3 publications

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“…It is known that high-speed optical fiber communication systems rely critically on the design of complex filters to perform various functions such as dispersion compensation [1], distributed feedback lasing [2], optical filtering [3], in codirectional couplers [4], etc. Several experimental techniques have been demonstrated to fabricate nonuniform gratings, permitting an accurate control of both the local grating pitch and the apodization profile along the structure [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Novel algorithm for synthesis of fiber gratings

Chen

et al. 2009

Front. Optoelectron. China

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A novel algorithm for the synthesis of fiber gratings is presented. For the first time we propose an effective optimal approach to construct a coupling coefficient function by employing 4th-order Runge-Kutta (R-K) analysis method for calculating the reflection spectra of fiber gratings. The numerical results show that with this proposed method, some required optical filters have been yielded with better features compared with other methods such as Gel'Fand-Levitan-Marchenko (GLM) algorithm. In addition, the performance of different interpolation functions particularly utilized in our algorithm, including linear-type, spline-type, and Hermit-type, are discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Novel algorithm for synthesis of fiber gratings

Chen

et al. 2009

Front. Optoelectron. China

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“…A distributed feedback (DFB) laser diode is one of the most important devices for optical-communication systems [1][2][3][4][5][6]. To achieve single-mode operation, /4 phase-shifted DFB lasers have been developed [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…To achieve single-mode operation, /4 phase-shifted DFB lasers have been developed [1,2]. It should be noted, however, that the optical intensities of such lasers increase around the phase-shifted region, resulting in spatial-hole burning.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of DFB lasers with uniform longitudinal-intensity distributions using the modified time-domain traveling-wave algorithm

Shibayama

Muraki

Yamauchi

et al. 2004

Microw. Opt. Technol. Lett.

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Using the modified time-domain traveling-wave algorithm, we investigate DFB lasers with uniform longitudinal-intensity distributions. It is shown that a uniform longitudinal-intensity distribution is effectively obtained by a combination of adding multiple phase shifts and varying coupling coefficients along the longitudinal direction.ABSTRACT: Recently, in order to satisfy the demand for precise and reliable global positioning system (GPS) applications, the dual-band circularly polarized (CP) antenna has been developed. This paper describes a new design of a probe-fed dual-band CP microstrip antenna with two corner-truncated square patches that overlap without an air gap. Compared with the conventional dual-band CP antenna with an air-gap layer between the two patches, the volume of this antenna is reduced and its fabrication is easier. Details of the proposed antenna design and experimental results are presented and discussed. The measured results confirm the validity of this design, which can meet the requirement of GPS application at 1575/1227-MHz frequencies.

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“…However, the single-mode yield is low due to the random facet phase introduced by cleaving [4]. Another approach is to incorporate a X/4 phase-shifted region in the middle of the laser cavity in combination with low AR coating on both facets [5], [6] to achieve a high dynamic single-mode yield, but the device performance is more sensitive to spatial holeburning [7].…”

Section: Introductionmentioning

confidence: 99%

Dynamic properties of partly gain-coupled 1.55-μm DFB lasers

Makino

1995

IEEE J. Quantum Electron.

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The lasing characteristics and dynamic properties of partly gain-coupled 1.55-pm DFB lasers with a gain corrugation in the strained-layer MQW active region are. presented. Narrow spectral linewidth, which is associated with the low linewidth enhancement factor, was experimentally measured. By analyzing data from RIN measurements, the damping rate, the damping factor, the intrinsic bandwidth and the effective differential gain were obtained. From the small-signal frequency response, a measured -3 dB bandwidth of 22 GHz at 10 mW output power was achieved. The high bandwidth is believed to be related to the high differential gain, resulting from the combination of longitudinal gain-and index-coupling mechanisms and the reduction of the carrier transport time, which is due to an efficient lateral carrier injection along the longitudinal interface. Experimental results show that under 10 Gbit/s pseudorandom NRZ modulation, the devices have small wavelength chirp and clear eye openings making them suitable for long haul and high bit-rate applications.

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1.5 μm phase-shifted DFB lasers for single-mode operation

Cited by 125 publications

References 3 publications

Novel algorithm for synthesis of fiber gratings

Novel algorithm for synthesis of fiber gratings

Numerical analysis of DFB lasers with uniform longitudinal-intensity distributions using the modified time-domain traveling-wave algorithm

Dynamic properties of partly gain-coupled 1.55-μm DFB lasers

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