Application of the transmission line laser model in analysis of multiple‐phase‐shift DFB lasers

Liu, Hairong; Ghafouri‐Shiraz, H.

doi:10.1002/mop.11283

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…In addition, the scattering of light inside each TLLM section is considered as the result of the interactions between the optical and electronic subsystems for different types of device sections. Self-pulsation mechanism is also included in the simulation model [40][41].…”

Section: Device Simulation Approachmentioning

confidence: 99%

Improvement on Direct Modulation Responses and Stability by Partially Corrugated Gratings Based DFB Lasers With Passive Feedback

2021

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DFB lasers with ultrashort cavities or integrated DFB lasers with passive waveguide reflectors are frequently proposed to realize directly modulated lasers (DMLs) for carrying ultrahigh data rate signals. The former suffers from poor heatsink and laser cleavage yield, while the single-mode stability of the latter scheme is seldom addressed. The mode selection and device performance of a DFB laser is well known to be very sensitive to the facet reflection and external optical feedback. The DFB lasers with partial corrugated gratings and passive feedback (PCG-PFL) are proposed here to overcome the challenging issues for the aforementioned two schemes. With PCG structure, the DFB lasers can maintain high single-mode yield (SMY) even with a high-reflection-coating on the rear facet and strong reflection from the integrated passive section. This provides the robustness in applying the integrated passive reflector to reshape the modulation response or to enhance the 3-dB bandwidth by using the photon-photon resonance (PPR) effect. By designing the PCG-PFL to have 150-m long laser section, 50-m long passive section, and 30% front-facet reflectivity, it can have about 86% of SMY, reduced resonant peak in the intensity modulation response, and reduced waveform overshoot and undershoot for transmitting 56-Gbaud/s PAM-4 signals. By using a longer passive reflector, enhanced bandwidth can be achieved by the PPR effect.

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Section: Device Simulation Approachmentioning

confidence: 99%

Improvement on Direct Modulation Responses and Stability by Partially Corrugated Gratings Based DFB Lasers With Passive Feedback

2021

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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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Analysis of the modulation impairments in optical sideband injection locking for millimeter-wave signal generation

Aldaya

Campuzano

Castañón

2014

Optics & Laser Technology

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Application of the transmission line laser model in analysis of multiple‐phase‐shift DFB lasers

Cited by 4 publications

References 15 publications

Improvement on Direct Modulation Responses and Stability by Partially Corrugated Gratings Based DFB Lasers With Passive Feedback

Improvement on Direct Modulation Responses and Stability by Partially Corrugated Gratings Based DFB Lasers With Passive Feedback

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

Analysis of the modulation impairments in optical sideband injection locking for millimeter-wave signal generation

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