How to launch 1 W into single-mode fiber from a single 1.48-μm flared resonator

Delepine, S.; Gerard, F.; Pinquier, A.; Fillion, T.; Pasquier, J.; Locatelli, D.; Chardon, Jean-Pierre; Bissessur, H.; Bouché, Nicolas; Boubal, F.; Salet, P.

doi:10.1109/2944.954119

Cited by 34 publications

(8 citation statements)

References 18 publications

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“…Spatial filtering structures, implemented with etched grooves at the sides of the RW section and usually known as beam spoilers have been customary employed in tapered lasers to improve the beam quality 2,9,20 . They are considered in our model by suppressing the optical field at the beam spoiler position, the same approach proposed in 9 .…”

Section: Swlfdo 0rghomentioning

confidence: 99%

Self-consistent electrical, thermal, and optical model of high-brightness tapered lasers

et al. 2002

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A quasi-3D model has been developed with the aim of studying the different factors limiting the performance of highbrightness high-power tapered lasers. The model solves the complete semiconductor and thermal equations, neglecting the flow of carriers and heat along the cavity axis, together with a 2D Wide-Angle Beam Propagation method solving the optical propagation. The coupling between electrical, thermal and optical equations yields a stable solution which incorporates carrier and temperature induced perturbations of the refractive index. Although tapered lasers have already demonstrated superior beam quality performance in comparison with broad area devices, they still suffer from beam filamentation at high power levels. We analyze the influence of the different competing factors in the self-focusing process for 980 nm lasers with a gain guided taper section. The simulation results indicate that the lasers with the longest taper section provide the highest output power before the filamentation process is triggered, and that the backward propagating field plays a crucial role in the stability of the output beam..H\ZRUGV Semiconductor lasers, high power lasers, tapered lasers, modeling, numerical simulation.,1752'8&7,21Several applications, such as optical pumping or medical instrumentation, demand high output power lasers with good beam quality. Broad area lasers provide high output power at the cost of poor far field (FF) patterns due to unstable lateral modes. Tapered semiconductor lasers, also known as flared unstable cavity lasers, have demonstrated both high power and good beam quality at different wavelengths 1-8 . These devices consist of a ridge waveguide (RW) section providing a single spatial mode launched into an index or gain guided taper section.The CW operation of tapered single pass amplifiers can be simply understood in terms of beam propagation along a gain region with carrier and temperature index perturbations 2 . The optical output characteristics of tapered lasers are consequence of a complicated interaction between the forward and backward propagating fields and the semiconductor active material. Tapered lasers suffer from filamentation and multi-peak FF patterns at high output power, limiting the maximum optical power to be launched in an optical fiber. Accurate designs tools, taking into account as much as possible the intrinsic three-dimensional nature of the device, are crucial for a better understanding of the underlying physics and for the optimization of the geometry.Previous theoretical models on tapered lasers and amplifiers 1,9,10 have relied on the paraxial approximation for the optical propagation and on simplified unipolar electrical equations. We have developed a quasi-3D model that solves the complete ELSRODU electrical and thermal equations, but neglects the flow of heat and carriers along the propagation axis. The electro-thermal model is coupled to a ZLGHDQJOH 2D beam propagation method (BPM), which accurately solves for the optical field distribution.The model has been...

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Section: Swlfdo 0rghomentioning

confidence: 99%

Self-consistent electrical, thermal, and optical model of high-brightness tapered lasers

et al. 2002

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“…The optical feedback to the The authors are with the Ferdinand-Braun-Institut gGmbH, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany TPA may deteriorate the spatial beam quality [6], [7] but it can be expected that the backward propagating light is also amplified in the TPA and increases the feedback towards the MO dramatically. With respect to the feedback sensitivity of master oscillators like DBR-RWLs [8] a proper selection of the laser and optical isolator is necessary.…”

Section: Introductionmentioning

confidence: 99%

Optical Feedback Generated by Tapered Amplifiers Emitting at 1120 nm

Werner

Thies

Paschke

et al. 2022

IEEE J. Quantum Electron.

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In this work the optical feedback generated by a tapered amplifier (TPA) emitting at 1120 nm is characterized at different operational conditions. The TPA is operated in a master oscillator power amplifier (MOPA) configuration, while the influence of pump current or seed power on the emitted feedback is investigated. Measurements are also performed with the TPA exposed to defined external optical feedback. For an estimation of the feedback from the TPA a simple formula is derived and the calculations are compared to the measurement results. With the experimental and theoretical results the required feedback resistance of the master oscillator seed source can be defined and the MOPA system optimized for certain applications with unwanted optical feedback.

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“…For example an integrated light source consisting of 3 µm-wide SLD and tapered SOA of 1500 µm length and 130 µm output aperture based on InGaPAs MQW-SCH 4 exhibited at pulse pumping the output power more than 300 mW. But a coupling of the output emission of such light sources into SM optical fiber is a complicated and expensive problem 5 . In present work we have been concentrated on a study of (InGa)PAs SOA with narrow active region that ensures the effective coupling of the output emission into SM fiber.…”

Section: Introductionmentioning

confidence: 99%

Broadband high-brightness light sources based on semiconductor optical amplifier and superluminescent diode

Prokhorov¹,

Shvakov²,

Yakubovich³

2005

SPIE Proceedings

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It is experimentally shown that a semiconductor optical amplifier (SOA) ensures a significant improvement of output characteristics of a superluminescent diode (SLD). Using SOA based on (InGa)PAs SC DH (central wavelength -1300 nm) in MOPA system with SLD as a master oscillator a CW output power of 50 mw ex SM fiber was obtained. The same SOA used as a combiner of its own ASE and red-shifted input SLD light signal permits obtaining the output emission with linewidth near 70 nm.

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How to launch 1 W into single-mode fiber from a single 1.48-μm flared resonator

Cited by 34 publications

References 18 publications

Self-consistent electrical, thermal, and optical model of high-brightness tapered lasers

Self-consistent electrical, thermal, and optical model of high-brightness tapered lasers

Optical Feedback Generated by Tapered Amplifiers Emitting at 1120 nm

Broadband high-brightness light sources based on semiconductor optical amplifier and superluminescent diode

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