Abstract
An integrated parabolic lens capable of introducing a diverging effect to the optical mode propagating within the cavity of a tapered laser is proposed and demonstrated. This idea allows broader high-power beams to be generated by shorter cavities. Diverging lenses with etch depths of 0.13 and 0.27 μm are implemented, with 12 (9.5%) and 16.8 μm(13.3%) overall broadening of the near-fields widths measured at 1/e2 intensity. The peak output power as well as the threshold current is found to increase following the lens etching process, confirming the beneficial broadening effect introduced by the diverging lens.
Original language | English |
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Pages (from-to) | 203-205 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 19 |
Issue number | 4 |
DOIs | |
Publication status | Published - 15 Feb 2007 |
Funding
Manuscript received March 21, 2006; revised October 27, 2006. This work was supported in part by the European Community through the research project WWW.BRIGHT.EU (Wide Wavelength light for public Welfare: High-Brightness Laser Diode Systems for Health, Telecom and Environment Use, IST – 511 722).
Keywords
- Beam quality
- Catastrophic optical mirror damage (COMD)
- Diverging lens
- Gaussian beam
- High-brightness lasers
- High-power lasers
- Integrated lens
- M factor
- Mode expansion
- Tapered lasers
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering