Tunable dual-wavelength fiber laser

Moore, Peter J.; Chaboyer, Zachary J.; Das, Gautam

doi:10.1016/j.yofte.2009.04.001

Cited by 19 publications

(7 citation statements)

References 22 publications

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“…Although these devices exhibit a wide tuning range of the optical mode beat frequency using a distributed Bragg reflector laser diode (LD) structure or integrated micro-heaters (µheaters), a single cavity scheme is preferable because of the improved spectral purity of the resulting CW THz radiation. The longitudinal single-mode operation of the reported dualwavelength fiber lasers [14], [15] is a critical problem because it prevents fiber lasers from being used as optical beat sources. In addition, optical-comb based optical beat sources [16] appear to be particularly suitable as beat sources for CW THz generation from a physical point of view; however, they present problems in optical tunable filters, and their complex configurations have yet to be resolved.…”

Section: Introductionmentioning

confidence: 99%

SOA-Integrated Dual-Mode Laser and a PIN-Photodiode for Compact CW Terahertz System

Lee¹,

Kim²,

Han³

et al. 2016

ETRI J

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We designed and fabricated a semiconductor optical amplifier‐integrated dual‐mode laser (SOA‐DML) as a compact and widely tunable continuous‐wave terahertz (CW THz) beat source, and a pin‐photodiode (pin‐PD) integrated with a log‐periodic planar antenna as a CW THz emitter. The SOA‐DML chip consists of two distributed feedback lasers, a phase section for a tunable beat source, an amplifier, and a tapered spot‐size converter for high output power and fiber‐coupling efficiency. The SOA‐DML module exhibits an output power of more than 15 dBm and clear four‐wave mixing throughout the entire tuning range. Using integrated micro‐heaters, we were able to tune the optical beat frequency from 380 GHz to 1,120 GHz. In addition, the effect of benzocyclobutene polymer in the antenna design of a pin‐PD was considered. Furthermore, a dual active photodiode (PD) for high output power was designed, resulting in a 1.7‐fold increase in efficiency compared with a single active PD at 220 GHz. Finally, herein we successfully show the feasibility of the CW THz system by demonstrating THz frequency‐domain spectroscopy of an α‐lactose pellet using the modularized SOA‐DML and a PD emitter.

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Section: Introductionmentioning

confidence: 99%

SOA-Integrated Dual-Mode Laser and a PIN-Photodiode for Compact CW Terahertz System

Lee¹,

Kim²,

Han³

et al. 2016

ETRI J

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“…As can be seen from that figure, a short section of unpumped highly doped fiber was included between the two FBGs forming an additional active cavity. As is already known, in order to ensure single-frequency operation of a grating-based laser, a short laser cavity length (typically, a few centimeters) and a narrow wavelength selective filter are required [18]. This is to ensure that only a few axial modes fall within the grating bandwidth to avoid modehopping.…”

Section: Dual-wavelength Single-cavity Lasermentioning

confidence: 99%

Experimental Optimization in Terms of Power Stability and Output Power of Highly Erbium-Doped Fiber Lasers with Single and Hybrid Cavities

Pérez-Herrera

Chen

Zhao

et al. 2010

Fiber and Integrated Optics

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In this article, the output power stability of several different highly erbiumdoped fiber ring lasers, as a function of the laser parameters, is experimentally investigated. The study is focused on the optimization of several key parameters (erbium-doped fiber length, pump power, and different laser configurations) without changing the basic scheme. The results obtained show that the laser configuration plays an important role in achieving stable multi-wavelength lasing at room temperature in the erbium-doped fiber ring lasers. For an optimized configuration, these power fluctuations are lower than 0.08 dB, showing a notable improvement compared with previously presented work where the output power variations were about 0.2 dB. These lasers have the advantage of a simple all-fiber configuration, low cost, high stability, and operability at room temperature.

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“…The CW THz optical source can be realized using photo‐mixing resulting from a dual‐mode optical source whose spacing can be tuned exceeding −1 THz without mode hopping. Several research groups have been reporting on the realization of beat optical sources for generating CW THz wave . Monolithically integrated dual‐mode laser sources with two independent cavity structure composed of distributed Bragg reflectors (DBRs) and integrated micro heaters for wide tuning of wavelength spacing of the dual‐mode laser have been reported .…”

Section: Introductionmentioning

confidence: 99%

“…Several research groups have been reporting on the realization of beat optical sources for generating CW THz wave. [9][10][11] Monolithically integrated dual-mode laser sources with two independent cavity structure composed of distributed Bragg reflectors (DBRs) and integrated micro heaters for wide tuning of wavelength spacing of the dual-mode laser have been reported. [11][12][13] Even though the dual-mode laser source provides wide tuning range, an in-line single cavity approach is favored for the generation of CW THz wave with good spectral quality.…”

Section: Introductionmentioning

confidence: 99%

Split‐step time‐domain modeling of dual‐mode DFB laser diode for terahertz wave generation

Chung

2019

Micro & Optical Tech Letters

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A split‐step time‐domain modeling is applied to investigate the characteristics of dual‐mode distributed feedback (DFB) laser diode (LD) for terahertz (THz) wave generation. The THz wave generation from 163 to 1,378 GHz by proper thermo‐optic tuning and initial detuning combination is effectively simulated, which is qualitatively analogous to the experimental results. It is shown that the residual facet reflectivity should be below 0.003 to suppress the facet‐to‐facet cavity modes and provide good spectral quality. The time‐domain simulation tool could be incorporated into future THz fiber‐optic communication systems.

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Tunable dual-wavelength fiber laser

Cited by 19 publications

References 22 publications

SOA-Integrated Dual-Mode Laser and a PIN-Photodiode for Compact CW Terahertz System

SOA-Integrated Dual-Mode Laser and a PIN-Photodiode for Compact CW Terahertz System

Experimental Optimization in Terms of Power Stability and Output Power of Highly Erbium-Doped Fiber Lasers with Single and Hybrid Cavities

Split‐step time‐domain modeling of dual‐mode DFB laser diode for terahertz wave generation

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