1.9 W continuous-wave single transverse mode emission from 1060 nm edge-emitting lasers with vertically extended lasing area

Miah, Md. Jarez; Kettler, T.; Posilovic, K.; Kalosha, V. P.; Skoczowsky, Danilo; Rosales, Ricardo; Bimberg, D.; Pohl, J.; Weyers, M.

doi:10.1063/1.4898010

Cited by 46 publications

(25 citation statements)

References 23 publications

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“…In This work square-core optical fiber is used for propagating light with a wavelength of 1060 nm. This wavelength of the light is used in many fields such as single-mode diode lasers for telecommunication, industrial and medical applications [41]- [43], gain-switched laser diodes for high average power and high repetition rate [44], high-brightness edgeemitting semiconductor lasers [45], hybrid integrated tunneling diode [46], compact ultrafast reflective Fabry-Perot tunable lasers [47], cutting and skin-ablative properties of pulsed mid-infrared laser surgery [48], fibercoupled diode lasers for material processing and pumping applications [49], ultrashort pulse fiber amplifiers [50] and others.…”

Section: A Physical Structure Of Square-core Optical Fibermentioning

confidence: 99%

Investigation of Total Energy Density and Power Flow for Propagating Modes of Square-Core Optical Fiber

Saghi

2021

IJOP

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Square-core optical fiber is one of the modern optical fibers used in many fields such as astronomical spectroscopy, laser cutting and thermal applications of lasers and beam shaping optics. In this paper, an optical fiber that has a square core with a side of 55 µm is designed for propagating laser light at a wavelength of 1060 nm. Then, using numerical analysis by finite element method (FEM), the distribution of electric and magnetic fields with different polarizations and magnetizations is analyzed for the first three propagating modes of the optical fiber. In the following, the changes of total energy density and power flow are investigated. Finally, the results of the figures and plots are discussed completely.

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Section: A Physical Structure Of Square-core Optical Fibermentioning

confidence: 99%

Investigation of Total Energy Density and Power Flow for Propagating Modes of Square-Core Optical Fiber

Saghi

2021

IJOP

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“…The demand for such semiconductor lasers has been rapidly increasing for a wide variety of applications including next-generation laser processing 1 , 2 and remote sensing 3 , 4 . Conventional semiconductor lasers such as edge-emitting lasers and vertical-cavity surface-emitting lasers involve fundamental difficulties for single-mode high-power operation because an increase of the device size inevitably results in the onset of multiple transverse-mode lasing 5 – 8 . On the other hand, photonic-crystal surface-emitting lasers (PCSELs) 9 – 16 , which utilize a two-dimensional standing-wave resonance at a singularity point (Γ point, etc.)…”

Section: Introductionmentioning

confidence: 99%

General recipe to realize photonic-crystal surface-emitting lasers with 100-W-to-1-kW single-mode operation

et al. 2022

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Realization of one-chip, ultra-large-area, coherent semiconductor lasers has been one of the ultimate goals of laser physics and photonics for decades. Surface-emitting lasers with two-dimensional photonic crystal resonators, referred to as photonic-crystal surface-emitting lasers (PCSELs), are expected to show promise for this purpose. However, neither the general conditions nor the concrete photonic crystal structures to realize 100-W-to-1-kW-class single-mode operation in PCSELs have yet to be clarified. Here, we analytically derive the general conditions for ultra-large-area (3~10 mm) single-mode operation in PCSELs. By considering not only the Hermitian but also the non-Hermitian optical couplings inside PCSELs, we mathematically derive the complex eigenfrequencies of the four photonic bands around the Γ point as well as the radiation constant difference between the fundamental and higher-order modes in a finite-size device. We then reveal concrete photonic crystal structures which allow the control of both Hermitian and non-Hermitian coupling coefficients to achieve 100-W-to-1-kW-class single-mode lasing.

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“…The potential for higher output power with simultaneously good beam quality makes GaSb-based single-transverse-mode narrow ridge waveguide (RW) lasers ideally suited light sources for various scientific and commercial applications, such as pumping rare-earth-doped fiber amplifiers and solid-state lasers [ 8 – 10 ], seeding external cavity lasers [ 11 , 12 ], and nonlinear frequency conversion [ 13 ]. In addition, narrow RW structure is also widely employed in various laser devices, such as distributed-feedback (DFB) lasers [ 3 , 14 ], distributed Bragg reflector (DBR) lasers [ 15 , 16 ], superluminescent diodes (SLD) [ 5 , 17 ], semiconductor optical amplifiers (SOA) [ 18 ], and tapered lasers [ 19 ], owing to its ability to guarantee high transverse mode purity and stability, which enables the use of simple and low-cost optics for the focusing and coupling of these devices for further utilization.…”

Section: Introductionmentioning

confidence: 99%

Promotion of Specific Single-Transverse-Mode Beam Characteristics for GaSb-Based Narrow Ridge Waveguide Lasers via Customized Parameter Design

et al. 2022

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GaSb-based single-transverse-mode narrow ridge waveguide (RW) lasers with high power and simultaneous good beam quality have broad application prospects in the mid-infrared wavelength region. Yet its design and formation have not been investigated systematically, while the beam characteristics that affect their suitability for specific applications remain rarely analyzed and optimized. The present work addresses these issues by theoretically establishing a waveguide parameter domain that generalizes the overall possible combinations of ridge widths and etch depths that support single-transverse-mode operation for GaSb-based RW lasers. These results are applied to develop two distinct and representative waveguide designs derived from two proposed major optimization routes of model gain expansion and index-guiding enhancement. The designs were evaluated experimentally based on prototype 1-mm cavity-length RW lasers in the 1950 nm wavelength range, which were fabricated with waveguides having perpendicular ridge and smooth side-walls realized through optimized dry etching conditions. The model gain expanded RW laser design with a relatively shallow-etched (i.e., 1.55 $$\upmu$$ μ m) and wide ridge (i.e., 7 $$\upmu$$ μ m) yielded the highest single-transverse-mode power to date of 258 mW with a narrow lateral divergence angle of 11.1$$^\circ$$ ∘ full width at half maximum at 800 mA under room-temperature continuous-wave operation, which offers promising prospects in pumping and coupling applications. Meanwhile, the index-guiding enhanced RW laser design with a relatively deeply etched (i.e., 2.05 $$\upmu$$ μ m) and narrow ridge (i.e., 4 $$\upmu$$ μ m) provided a highly stable and nearly astigmatism-free fundamental mode emission with an excellent beam quality of M$$^2$$ 2 factor around 1.5 over the entire operating current range, which is preferable for seeding external cavity applications and complex optical systems.

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1.9 W continuous-wave single transverse mode emission from 1060 nm edge-emitting lasers with vertically extended lasing area

Cited by 46 publications

References 23 publications

Investigation of Total Energy Density and Power Flow for Propagating Modes of Square-Core Optical Fiber

Investigation of Total Energy Density and Power Flow for Propagating Modes of Square-Core Optical Fiber

General recipe to realize photonic-crystal surface-emitting lasers with 100-W-to-1-kW single-mode operation

Promotion of Specific Single-Transverse-Mode Beam Characteristics for GaSb-Based Narrow Ridge Waveguide Lasers via Customized Parameter Design

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