Investigation on ultimate efficiency of spectral beam combining based on an external cavity

Zhan, Shengbao; Zhuo-liang, WU; Jibao, Hu; Zhang, Jie; Wang, Peng; You, Jiancun; Wen, Jun

doi:10.1016/j.ijleo.2018.01.049

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…e di erence in output e ciency between the two con gurations is mainly caused by the di erence in feedback intensity (R 3 ) at the backend of the external cavity. As the increase of the backend feedback intensity, the output e ciency gradually decreases [12].…”

Section: Simulation Resultsmentioning

confidence: 99%

“…show the schematic diagram of con gurations 1 and 2, respectively. According to the generation principle of laser, the system can be simpli ed, as shown in Figure 2 [12].…”

Section: Simpli Cation Of Tunable Systems Figures 1(a) and 1(b)mentioning

confidence: 99%

“…Assuming the length of the gain ber is L, that of the resonator is L′, launched pump power is P in p , and the output power is P out . According to the framework shown in Figure 2, if the transmissivity of the front-cavity mirror to the pump light equals 1, then the following equations can be obtained [12]:…”

Section: Simpli Cation Of Tunable Systems Figures 1(a) and 1(b)mentioning

confidence: 99%

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Comparison of Output Performance of Tunable Lasers with Two Different External Cavities

Wang

Zhan

et al. 2022

International Journal of Optics

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Based on the simplified model of the tunable fiber laser system, the tuning performance of the laser was analyzed. Two kinds of tunable setups were established, which are the configurations with an external cavity and the configuration of the Littrow cavity. The tuning output characteristics experimentally were analyzed by means of setups. The simulation gives the output efficiency of two tunable lasers as 40% and 30%. In the experiment, the measured slope efficiency of the two lasers was 24% and 18.3%, and the tunable range of the two lasers was 32 nm and 40 nm, respectively. Both lasers could achieve laser output with good beam quality.

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Section: Simulation Resultsmentioning

confidence: 99%

“…show the schematic diagram of con gurations 1 and 2, respectively. According to the generation principle of laser, the system can be simpli ed, as shown in Figure 2 [12].…”

Section: Simpli Cation Of Tunable Systems Figures 1(a) and 1(b)mentioning

confidence: 99%

Section: Simpli Cation Of Tunable Systems Figures 1(a) and 1(b)mentioning

confidence: 99%

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Comparison of Output Performance of Tunable Lasers with Two Different External Cavities

Wang

Zhan

et al. 2022

International Journal of Optics

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“…However, further enhancement in the diffraction efficiency required some modifications to the grating structure. As increasingly complicated and efficient diffractive structures were needed, the complexity of the grating structure quickly increased [15]. Depending on the desired optical functionality, the required grating surface patterns might have two, three, or even more layers.…”

Section: Introductionmentioning

confidence: 99%

Design of a High-Efficiency Multilayer Dielectric Diffraction Grating with Enhanced Laser Damage Threshold

Pham

et al. 2022

Nanomaterials

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Diffraction gratings are becoming increasingly widespread in optical applications, notably in lasers. This study presents the work on the characterization and evaluation of Multilayer Dielectric Diffraction Gratings (MDG) based on the finite element method using Comsol MultiPhysics software. The optimal multilayer dielectric diffraction grating structure using a rectangular three-layer structure consisting of an aluminum oxide Al2O3 layer sandwiched between two silicon dioxide SiO2 layers on a multilayer dielectric mirror is simulated. Results show that this MDG for non-polarized lasers at 1064 nm with a significantly enhanced −1st diffraction efficiency of 97.4%, reaching 98.3% for transverse-electric (TE) polarization and 96.3% for transverse-magnetic (TM) polarization. This design is also preferable in terms of the laser damage threshold (LDT) because most of the maximum electric field is spread across the high LDT material SiO2 for TE polarization and scattered outside the grating for TM polarization. This function allows the system to perform better and be more stable than normal diffraction grating under a high-intensity laser.

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Theoretical and experimental researches for spectral beam combining based on a concave grating

Zhan

Zou

et al. 2023

Optics Communications

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Investigation on ultimate efficiency of spectral beam combining based on an external cavity

Cited by 4 publications

References 22 publications

Comparison of Output Performance of Tunable Lasers with Two Different External Cavities

Comparison of Output Performance of Tunable Lasers with Two Different External Cavities

Design of a High-Efficiency Multilayer Dielectric Diffraction Grating with Enhanced Laser Damage Threshold

Theoretical and experimental researches for spectral beam combining based on a concave grating

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