Coherent light generators – Particular beam control device – Tuning
Reexamination Certificate
2010-01-19
2011-10-18
Nguyen, Dung (Department: 2828)
Coherent light generators
Particular beam control device
Tuning
C372S045013, C372S050100, C372S050110
Reexamination Certificate
active
08040928
ABSTRACT:
A semiconductor laser is provided capable of generating very narrow laser beams and having stable characteristics, a method for generating the laser beams and a method for reducing a spectral line-width of the laser beams. The semiconductor laser includes a semiconductor active layer, a photonic crystal optical waveguide forming a periodic structure of two-dimensional refractive index within a plane perpendicular to a semiconductor laminate direction directly or indirectly connected to the semiconductor active layer; and an optical cavity that contains the semiconductor active layer and the photonic crystal optical waveguide and oscillates light that is generated from the semiconductor active layer and is guided through the photonic crystal optical waveguide as laser.
REFERENCES:
patent: 7535944 (2009-05-01), Guilfoyle et al.
patent: 2004/0147053 (2004-07-01), Glew et al.
patent: 2007-129028 (2007-05-01), None
patent: 2007-201293 (2007-08-01), None
patent: 2007-220922 (2007-08-01), None
M. Seimetz, “Laser line-width limitations for Optical Systems with High-order Modulation employing Feed Forward Digital Carrier Phase Estimation,” in Proc. Optical Fiber Communication Conference (OFC2008), San Diego, USA, paper OTuM2 (2008).
Kiyota, et al., “Laser and Optical Amplifier using Low Group Velocity Effect of Photonic Crystal Line Defect Waveguide”.
M. Okai, “Corrugation-Pitch-Modulated Corrugation-Pitch-Modulated MQW-DFB Laser with Narrow Spectral line-width (170 kHz),” IEEE Photonics Technol., Lett., vol. 2, No. 8, pp. 529-530, Aug. 1990.
K. Kikuchi, “Coherent Transmission Systems,” European Conference on Optical Communication (ECOC2008), Brussel Belgium, paper Th.2.A.1(2008).
Furukawa Electric Co. Ltd.
Nguyen Dung
Turocy & Watson LLP
LandOfFree
Semiconductor laser, method for generating laser beam and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor laser, method for generating laser beam and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor laser, method for generating laser beam and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4288398