Sabeur Te Siala

US Patent:

6407838, Jun 18, 2002

Filed:

Jul 19, 2000

Appl. No.:

09/619417

Inventors:

Ergun Canoglu - Sunnyvale CA
Sabeur Siala - Sunnyvale CA

Assignee:

LuxN, Inc. - Sunnyvale CA

International Classification:

H04J 1402

US Classification:

359127, 359119, 359131, 359138, 359114, 359124

Abstract:

A reconfigurable multi-add/drop module for optical communications. The system includes a first network interface GRIN lens collimator connected on one end to an optical fiber of a communications network. An output of the GRIN lens is directed to a series of slidable two-section channel filters. Each filter is mechanically movable to a first position that passes all wavelengths. The second position of each filter reflects a particular wavelength to a corresponding add/drop GRIN lens collimator that receives the reflected light and outputs it into an add/drop fiber. The outputs from the add/drop collimators are directed to a single add/drop fiber through use of a power combiner. Light that passes through all of the filters is directed into a second network interface GRIN lens collimator for the purpose of coupling the light onto a second network optical fiber. A carrier wavelength can also be entered/added at the add/drop port.

US Patent:

7548567, Jun 16, 2009

Filed:

Apr 1, 2005

Appl. No.:

11/097746

Inventors:

Vladimir Kupershmidt - Pleasanton CA, US
John Major - San Jose CA, US
Sabeur Siala - Sunnyvale CA, US

International Classification:

H01S 3/04

US Classification:

372 34, 372 36, 372 96, 372102

Abstract:

The present invention relates to an analog transmitter using an external cavity laser (ECL) in which specific characteristics of the ECL are enhanced and exploited to improve 2nd and 3rd order distortion while increasing the threshold for the occurrence of deleterious stimulated Brillouin scattering (SBS). The performance of the ECL shows a substantial reduction in distortion occurring over certain narrow ranges of operating temperatures. Optical, electronic, thermal and/or mechanical methods are described that cause this “distortion dip” to be moved to, or created at, stable regions of ECL operation, away from mode hops. Methods are also described that allow the distortion dip to be moved to, or created at, ECL operating regions in which sufficiently high chirp occurs, thereby reducing SBS. Transmitters and other devices employing these and related techniques are also described.

US Patent:

20030061393, Mar 27, 2003

Filed:

Sep 23, 2002

Appl. No.:

10/253308

Inventors:

Frank Steegmans - San Jose CA, US
Sabeur Siala - Sunnyvale CA, US

International Classification:

G06F015/173
G06F015/16

US Classification:

709/250000, 709/223000

Abstract:

Interconnection means in networks are tagged with machine accessible information tags. Relevant information related to the interconnection means (including identification means) is stored and maintained in the corresponding tags. Field technicians have a device to read, write, or update this information. Some of the said machine accessible information tags are attached to the termination point of said interconnection means. This type of tag is typically connected to and disconnected from the tag interface of the network node when the associated termination point is connected and disconnected from the network node. The network node will detect such an event and is able to read, write and update the information residing in the machine accessible information tag while it is connected. A network management system connected to the network nodes can correlate the different termination points of the same interconnection means and hence discover and maintain an accurate view of the network topology.

US Patent:

20050281298, Dec 22, 2005

Filed:

Apr 1, 2005

Appl. No.:

11/097745

Inventors:

Vladimir Kupershmidt - Pleasanton CA, US
Frans Kusnadi - San Jose CA, US
John Major - San Jose CA, US
Sabeur Siala - Sunnyvale CA, US

Assignee:

K2 Optronics - Sunnyvale CA

International Classification:

H01S003/04

US Classification:

372034000

Abstract:

The present invention relates to the analog external cavity lasers (ECLs) including designs, materials, methods of manufacturing and methods of use for such ECLs and packages for such ECLS. Numerous criteria are presented that lead to improved cost/performance for ECLs and for systems incorporating such ECLs.

US Patent:

20060251425, Nov 9, 2006

Filed:

Dec 22, 2005

Appl. No.:

11/316700

Inventors:

Vladimir Kupershmidt - Pleasanton CA, US
Henry Plaessmann - San Jose CA, US
John Major - San Jose CA, US
Sabeur Siala - Sunnyvale CA, US

Assignee:

K2 OPTRONICS - Sunnyvale CA

International Classification:

H04B 10/12

US Classification:

398147000

Abstract:

The present invention relates to the suppression of nonlinear fiber effects leading to optical noise, particularly Stimulated Brillouin Scattering (SBS), when narrow linewidth light sources are used in optical communication systems, particularly external cavity laser light sources. Various intra-cavity and extra-cavity modulation techniques are described that broaden the output of the laser light source so as to distribute the laser energy among multiple spectral lines and not exceed the SBS threshold. Thermal, mechanical and electrical modulation techniques are described.

US Patent:

20080219304, Sep 11, 2008

Filed:

Mar 14, 2008

Appl. No.:

12/049055

Inventors:

Vladimir Kupershmidt - Pleasanton CA, US
Frans Kusnadi - San Jose CA, US
John Major - San Jose CA, US
Sabeur Siala - Sunnyvale CA, US

International Classification:

H01S 3/13

US Classification:

372 2902

Abstract:

The present invention relates to the analog external cavity lasers (ECLs) including designs, materials, methods of manufacturing and methods of use for such ECLs and packages for such ECLs. Numerous criteria are presented that lead to improved cost/performance for ECLs and for systems incorporating such ECLs.

US Patent:

59149728, Jun 22, 1999

Filed:

Mar 24, 1997

Appl. No.:

8/823096

Inventors:

Sabeur Siala - Sunnyvale CA
Steven Sanders - Palo Alto CA
Mehrdad Ziari - Fremont CA

Assignee:

SDL, Inc. - San Jose CA

International Classification:

H01S 310

US Classification:

372 33

Abstract:

A thermal compensator for stabilization of the operation of a waveguide DBR laser against changes in its operational parameters due to operational temperature changes so that thermally induced longitudinal mode hopping in the laser is suppressed and, in addition, the desired operational wavelength may be stabilized.

US Patent:

61740926, Jan 16, 2001

Filed:

Jan 11, 1999

Appl. No.:

9/229054

Inventors:

Sabeur Siala - Sunnyvale CA

Assignee:

OESYS Photonics, Inc. - Sunnyvale CA

International Classification:

G02B 636

US Classification:

385 91

Abstract:

A method of aligning an optical fiber for coupling light to or from an optical device and fixing the optical fiber to an optical fiber support is disclosed. The method includes positioning the optical fiber into alignment with the optical device. An adapter is positioned between the optical fiber and the optical fiber support. The adapter is formed to substantially fill a gap between the optical fiber and the optical fiber support. The adapter is fixed to the optical fiber support and the adapter is fixed to the optical fiber.