Optical: systems and elements – Optical amplifier – Particular active medium
Patent
1991-12-09
1994-01-25
Lobo, Ian J.
Optical: systems and elements
Optical amplifier
Particular active medium
372 45, H01S 318
Patent
active
052820807
ABSTRACT:
An optical amplifier with at least one high reflectivity facet oriented at a nonperpendicular angle to the amplifier's waveguide to couple light vertically through a top or bottom surface of the amplifier. Angled facets could be at just one end of the waveguide or at both ends of the waveguide. In the latter case, the facets can be approximately parallel to or perpendicular to each other for respective coupling to opposite or same sides of the amplifier. Multiple amplifiers can be formed end-to-and with v-grooves defining the angled facets or can be formed side-by-side with parallel waveguides. Waveguides can also branch to form a 1:2, 1:4 or 2:2 optical signal multiplier or optical switch depending on whether just one or all of the waveguide branches are electrically pumped. Fibers are coupled to the amplifier receiving and emitting surfaces. Angling the fiber end with respect to the surface prevents reflections from feeding back into the amplifier waveguide. The facets can also be oriented at an angle other than 45.degree. to direct the light out of the surface at a nonperpendicular angle.
REFERENCES:
patent: 3465159 (1969-09-01), Stern
patent: 3621459 (1971-11-01), Reeves
patent: 3996492 (1976-12-01), McGroddy
patent: 4163953 (1979-08-01), Springthorpe et al.
patent: 4194162 (1980-03-01), Uematsu et al.
patent: 4821276 (1989-04-01), Alphonse et al.
patent: 4872180 (1989-10-01), Rideout et al.
patent: 4881236 (1989-11-01), Brueck et al.
patent: 4896195 (1990-01-01), Jansen et al.
patent: 4993799 (1991-02-01), Stein
patent: 5019787 (1991-05-01), Carlson et al.
patent: 5026138 (1991-06-01), Boudreau et al.
patent: 5119039 (1992-06-01), Olshansky et al.
"Polarisation-Independent Optical Amplifier with Buried Facets", Electronics Letters, vol. 25, No. 15, pp. 1048-1049, Aug. 3, 1989.
Salzman et al., "Modal Coupling in tilted . . . Amplifiers," Jun. 1988, Optics Letters, vol. 13, #6, pp. 455-457.
Zah et al., "1.3 um GaInAsP Near Travelling Wave Laser Amplifiers made by combination of Angled Facets and Antireflection Coatings," Electronics Letters, vol. 24, #20, Sep. 1988, pp. 1270-1276.
Scifres Donald R.
Welch David F.
Lobo Ian J.
SDL Inc.
LandOfFree
Surface coupled optical amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface coupled optical amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface coupled optical amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-732202