[1] Sverdlov B, Pfeiffer H U, Zibik E, et al. Optimization of fiber coupling in ultra-high power pump modules at =980 nm[C]//SPIE, 2013, 8605:860508.
[2] Agnieszka Pietrzak, Hans Wenzel, Gtz Erbert, et al. High-power laser diodes emitting light above 1100 nm with a small vertical divergence angle of 13[J]. Optics Letters, 2008, 33(19):2188-2190.
[3] Feit M D, Fleck J A, Jr. Beam nonparaxiality, filament formation, and beam breakup in the self-focusing of optical beams[J]. J Opt Soc Am B, 1988, 5(3):633-640.
[4] Eliseev P G, Glebov A, Osinski M. Modeling of current crowding accompanying optical filament formation in semiconductor lasers and amplifiers[C]//SPIE, 1997, 2994:580-590.
[5] Zheng Dai, Rainer Michalzik, Peter Unger, et al. Numerical simulation of broad-area high-power semiconductor laser amplifiers[J]. IEEE Journal of Quantum Electronics, 1997, 33(12):2240-2254.
[6] Robert J Lang, David Mehuys, Amos Hardy, et al. Spatial evolution of filaments in broad area diode laser amplifiers[J]. Applied Physics Letters, 1993, 62(11):1209-1211.
[7] Crump P, Winterfeldt M, Decker J, et al. Limitations to brightness in high power laser diodes[C]//2015 IEEE Photonics Conference (IPC), 2015:553-554.
[8] Crump P, Winterfeldt M, Decker J, et al. Novel approaches to increasing the brightness of broad area lasers[C]//SPIE, 2016, 9767:97671L.
[9] Alexander Bachmann, Christian Lauer, Michael Furitsch, et al. Recent brightness improvements of 976 nm high power laser bars[C]//SPIE, 2017, 10086:1008602.
[10] Crump P, Erbert G, Wenzel H, et al. Efficient high-power laser diodes[J]. IEEE J Sel Top Quant Electron, 2013, 19(4):1501211.
[11] Heiko Kissel, Paul Wolf, Alexander Bachmann, et al. Tailored bars at 976 nm for high-brightness fiber-coupled modules[C]//SPIE, 2017, 10086:100860B.
[12] Kanskar M, Bao L, Chen Z, et al. Flared oscillator waveguide diodes(FLOW-Diodes) enable high brightness fiber-coupled modules[C]//The 25th International Semiconductor Laser Conference(ISLC), 2016, WE16.
[13] Kanskar M, Bao L, Chen Z, et al. Continued improvement in reduced-mode(REM) diodes enable 272 W from 105 m 0.15 NA Beam[C]//SPIE, 2017, 10086:1008609.
[14] Hans-Christoph Eckstein, Uwe Zeitner, Andreas Tnnermann, et al. Numerical simulation and optimization of micro structured high brightness broad area laser diodes[C]//SPIE, 2015, 9382:93821H.
[15] Martin Winterfeldt, Paul Crump, Steffen Knigge, et al. High beam quality in broad area lasers via suppression of lateral carrier accumulation[J]. IEEE Photonics Technology Letters, 2015, 27(17):1809-1812.
[16] Feise D, Bl me G, Dittrich H, et al. High-brightness 635 nm tapered diode lasers with optimized index guiding[C]//SPIE, 2010, 7583:75830V.
[17] S mpf B, Adamiec P, Zorn M, et al. 650 nm tapered lasers with 1 W maxim m output power and nearly diffraction limited beam quality at 500 mW[C]//SPIE, 2008, 6876:68760M.
[18] S mpf B, Adamiec P, Zorn M, et al. Nearly diffraction-limited tapered lasers at 675 nm with 1-W output power and conversion effi-ciencies above 30%[J]. IEEE Photonics Technol Lett, 2011, 23(4):266-268.
[19] Erbert G, Fricke J, Hlsewede R, et al. 3 W-high brightness tapered diode lasers at 735 nm based on tensile strained GaAsP-QWs[C]//SPIE, 2003, 4995:29-38.
[20] Fiebig C, Bl me G, Kaspari C, et al. 12 W high-brightness single-frequency DBR tapered diode laser[J]. Electron Lett, 2008, 44(21):1253-1254.
[21] S mpf B, Hasler X H, Adamiec P, et al. 12.2 W output power from 1060 nm DBR tapered lasers with narrow spectral line width and nearly diffraction limited beam quality[C]//European Conference on Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference, 2009.
[22] Redmond S M, Creedon K J, Kansky J E. Active coherent beam combining of diode lasers[J]. Opt Lett, 2011, 36(6):999-1001.
[23] Missaggia L J, Redmond S M, Bratain M A, et al. Advanced packaging of high-power slab-coupled optical waveguide laser and amplifier arrays for coherent beam combining[C]//Lasers and Electro-Optics, 2010:CThX4.
[24] Huang R K, Channa B, Missaggia L J, et al. Coherently combined diode laser arrays and stacks[C]//CLEO/QELS, 2009:CWF1.
[25] Redmond S M, Creedon K J, Kansky J E. Active coherent beam combining of diode lasers[J]. Opt Lett, 2011, 36(6):999-1001.
[26] Gapontsev V, Moshegov N, Berezin I, et al. Highly-efficient high-power pumps for fiber lasers[C]//SPIE, 2017, 10086:1008604.
[27] Hemenway M, Urbanek W, Dawson D, et al. Advances in high-brightness fiber-coupled laser modules for pumping multi-kW CW fiber lasers[C]//SPIE, 2017, 10086:1008605.
[28] Kanskar M, Bao L, Chen Z, et al. Continued improvement in reduced-mode (REM) diodes enable 272 W from 105 m 0.15 NA beam[C]//SPIE, 2017, 10086:1008609.
[29] Kasai Y, Yamagatab Y, Kaifuchi Y, et al. High-brightness and high-efficiency fiber-coupled module for fiber laser pump with advanced laser diode[C]//SPIE, 2017, 10086:1008606.
[30] Yu H, Rossi G, Braglia A, et al. Development of a 300 W 105/0.15 fiber pigtailed diode module for additive manufacturing applications[C]//SPIE, 2017, 10086:100860A.
[31] Xu D, Guo Z J, Zhang T J, et al. 600 W high brightness diode laser pumping source[C]//SPIE, 2017, 10086:1008603.
[32] Kissel H, Wolf P, Bachmann A, et al. Tailored bars at 976 nm for high-brightness fiber-coupled modules[C]//SPIE, 2017, 10086:100860B.
[33] Knning T, Khler B, Wolf P, et al. Optical components for tailoring beam properties of multi-kW diode lasers[C]//SPIE, 2017, 10085:100850G.
[34] Witte U, Traub M, Meo A D, et al. Compact 35 m fiber coupled diode laser module based on dense wavelength division multiplexing of NBA mini-bars[C]//SPIE, 2017, 9733:97330H.
[35] Unger A, Uthoff R, Stoiber M, et al. Tailored bar concepts for 10 mm-mrad fiber coupled modules scalable to kW-class direct diode lasers[C]//SPIE, 2015, 9348:934809.
[36] Witte U, Schneider F, Holly C, et al. kW-class direct diode laser for sheet metal cutting based on commercial pump modules[C]//SPIE, 2017, 10086:1008608.
[37] Heinemann S, Fritsche H, Kruschke B, et al. Compact high brightness diode laser emitting 500 W from a 100 m fiber[C]//SPIE, 2017, 8605:86050Q.
[38] Fritsche H, Krusche B, Koch R, et al. High brightness, direct diode laser with kW output power[C]//SPIE, 2014, 8965:89650G.
[39] Hengesbach S, Krauch N, Holly C, et al. High-power dense wavelength division multiplexing of multimode diode laser radiation based on volume Bragg gratings[J]. Opt Lett, 2013, 38(16):3154-3157.
[40] Daneu V, Sanchez A, Fan T Y, et al. Spectral beam combining of a broad-stripe diode laser array in an external cavity[J]. Opt Lett, 2000, 25(6):405-407.
[41] Chann B, Huang R K, Missaggia L J, et al. Near-diffraction-limited diode laser arrays by wavelength beam combining[J]. Opt Lett, 2005, 30(16):2104-2106.
[42] Gopinath J T, Chann B, Fan T Y, et al. 1450-nm high-brightness wavelength-beam combined diode laser array[J]. Opt Express, 2008, 16(13):9405-9410.
[43] Hecht J. Beam combining cranks up the power[J]. Laser Focus World, 2012, 48(6):41-43.
[44] Zimer H, Haas M, Ried S, et al. Thin film filter wavelength-locked laser cavity for spectral beam combining of diode laser arrays[C]//2014 IEEE Photonics Conference, 2014:230-231.
[45] Zimer H, Haas M, Nagel S, et al. Spectrally stabilized and combined diode lasers[C]//2015 IEEE High Power Diode Lasers and Systems Conference(HPD), 2015:31-32.
[46] Strohmaier S G, Erbert G, Meissner-Schenk A H, et al. kW-class diode laser bars[C]//SPIE, 2017, 10086:100860C.
[47] Rong Jiamin, Xing Enbo, Wang Lijie, et al. Control of lateral divergence in high-power, broad-area photonic crystal lasers[J]. Applied Physics Express, 2016, 9:072104.
[48] Wang Tao, Tong Cunzhu, Wang Lijie, et al. Injection-insensitive lateral divergence in broad-area diode lasers achieved by spatial current modulation[J]. Applied Physics Express, 2016, 9:112102.