Anthony W. Yu - Spencerville MD, US Stewart W. Wilson - Billerica MA, US Dennis Bowler - Sudbury MA, US Peter J. S. Heim - Washington DC, US Scott A. Merritt - McLean VA, US
Assignee:
Covega, Inc. - Jessup MD
International Classification:
H10S 3/00 H01L 29/22
US Classification:
359344, 257 98
Abstract:
High power, low degree of polarization superluminescent diodes (SLDS) are described. A semiconductor optical amplifier (SOA) which amplifies light in substantially one polarizaton state can be used to create a SLD by combining the output from both sides of this polarization sensitive SOA in a manner which results in a depolarized output.
Variable Transmission Output Coupler And Deviationless Tuner For Tunable Lasers
Rajarshi Roy - Atlanta GA Anthony W. Yu - Atlanta GA
Assignee:
Georgia Tech Research Corporation - Atlanta GA
International Classification:
G02B 2608 G02B 718 H01S 308 H01S 310
US Classification:
350359
Abstract:
A variable transmission output coupler and deviationless tuner forms a part of a tunable laser cavity. The device uses frustrated total internal reflection to provide variable output coupling and laser tunability simultaneously. Two Pellin-Broca prisms are pressed against each other by a variable spring pressure mechanism. An adjustable screw regulates the variable force, controlling the thickness of an air film between two prism faces. The Pellin-Broca prisms enable tuning the laser without angular deviation of the output beam. All beams enter and exit at Brewster's Angle, minimizing losses. No coatings are used on the optical elements, reducing the possibility of damage at high operating power of the laser. The coupler may be used in pulsed as well as continuous wave lasers.
Automatic Failover Of A Software-Defined Storage Controller To Handle Input-Output Operations To And From An Assigned Namespace On A Non-Volatile Memory Device
- Singapore, SG Theodore B. Vojnovich - Raleigh NC, US Manjunatha Hebbar - Bangalore, IN Anthony C. Yu - Cary NC, US Patrick L. Caporale - Cary NC, US
International Classification:
G06F 11/20 G06F 13/40 G06F 3/06
Abstract:
An orchestration controller in a storage solution may establish namespaces, assign each namespace to a host, and establish software-defined storage controllers to handle input-output operations between the hosts and the namespaces. Each namespace is assigned to a given host and the input-output operations to and from the namespace are handled by a specific primary software-defined storage controller. In response to failure of the software defined controller, a secondary software-defined storage controller will take over handling of the input-output operations to and from the namespace. Also, in response to the failure of the software-defined storage controller, the host will direct subsequent input-output operations destined for the namespace to the secondary software-defined storage controller.
Polarization Maintaining, Large Mode Area (Pmvlma) Erbium-Doped Optical Fiber And Amplifier
The disclosed subject matter relates to a polarization-maintaining very large mode area (PM VLMA) Erbium-doped fiber and a polarization maintaining, Er-doped VLMA amplifier.