[2] Ecole Polytech, CNRS, LULI, CEA UPMC, F-91128 Palaiseau, France
[3] Power Photon, Edinburgh EH14 4AS, Midlothian, Scotland
[4] Thales Res & Technol, F-91767 Palaiseau, France
来源:
NOVEL IN-PLANE SEMICONDUCTOR LASERS VII
|
2008年
/
6909卷
关键词:
D O I:
10.1117/12.763398
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
This work relates to combining a phase corrected array of tapered laser diodes, emitting at lambda = 975 nm, coherently using the Talbot effect. Diffractive coupling of semiconductor lasers by use of the Talbot effect provides a means for coherent beam addition of multiple elements in laser diode arrays and makes possible a very compact external cavity. We have used, in this work, fully index guided tapered laser diodes. They contain a ridge waveguide, which acts as a modal filter, and a tapered section of increasing width, which provides high power. We have realized arrays of several emitters (N=10), which are not optically coupled to each other. First, to improve the beam quality of the array, a phase correcting micro system, achieving collimation in the fast axis, correction of the wave front tilts in both directions and also a slow axis collimation, was added. The FWHM divergences of the array were reduced from 34 degrees to 0.17 degrees in the fast-axis and from 3.5 degrees to 0.7 degrees in the slow-axis at 6A, 3.7 W. Then, to be close to diffraction limit, we have combined this corrected array coherently using the Talbot effect. We have obtained quasi-monolobe slow axis far field profile for the in phase mode with a central peak divergence of only 0.27 degrees at 1.5 A, 315 mW under CW operation and of only 0.20 degrees at 2.5 A, 787 mW under pulsed operation.
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
Defreez, R.K.
Paoli, T.L.
论文数: 0引用数: 0
h-index: 0
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
Paoli, T.L.
Bernstein, M.
论文数: 0引用数: 0
h-index: 0
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
Bernstein, M.
Burnham, R.D.
论文数: 0引用数: 0
h-index: 0
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
机构:
Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung, TaiwanNatl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan
Lin, Hao-wen weng
Sung, Chun-an
论文数: 0引用数: 0
h-index: 0
机构:
Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung, TaiwanNatl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan
Sung, Chun-an
Hung, Yu-han
论文数: 0引用数: 0
h-index: 0
机构:
Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan
Natl Sun Yat Sen Univ, Miniaturized Photon Gyroscope Res Ctr, Kaohsiung, TaiwanNatl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
Defreez, R.K.
Paoli, T.L.
论文数: 0引用数: 0
h-index: 0
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
Paoli, T.L.
Bernstein, M.
论文数: 0引用数: 0
h-index: 0
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
Bernstein, M.
Burnham, R.D.
论文数: 0引用数: 0
h-index: 0
机构:
Xerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USAXerox Palo Alto Research Cent, Palo, Alto, CA, USA, Xerox Palo Alto Research Cent, Palo Alto, CA, USA
机构:
Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung, TaiwanNatl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan
Lin, Hao-wen weng
Sung, Chun-an
论文数: 0引用数: 0
h-index: 0
机构:
Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung, TaiwanNatl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan
Sung, Chun-an
Hung, Yu-han
论文数: 0引用数: 0
h-index: 0
机构:
Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan
Natl Sun Yat Sen Univ, Miniaturized Photon Gyroscope Res Ctr, Kaohsiung, TaiwanNatl Sun Yat Sen Univ, Dept Photon, Kaohsiung, Taiwan