Rong Huang

US Patent:

6520652, Feb 18, 2003

Filed:

Nov 14, 2001

Appl. No.:

09/993271

Inventors:

Rong Huang - Woburn MA
Brian Cranton - Haverhill MA
Masud Azimi - Belmont MA

Assignee:

Nortel Networks Limited - St. Laurent

International Classification:

G02B 2700

US Classification:

359614, 359601, 359604, 359605, 359613

Abstract:

A method for reducing reflection of undesirable light in an opto-electronic package includes the coating of the interior surfaces of the package with light absorbing materials. Accordingly, when stray or scattered light is incident on package surfaces, reflections are minimized and therefore the optical noise, interference and feedback are reduced.

US Patent:

6639922, Oct 28, 2003

Filed:

Dec 13, 2001

Appl. No.:

10/021921

Inventors:

Daryoosh Vakhshoori - Cambridge MA
Masud Azimi - Nashua NH
Bartley C. Johnson - North Andover MA
Rong Huang - Woburn MA

Assignee:

CoreTek, Inc. - Billerica MA

International Classification:

H01S 310

US Classification:

372 20, 372 32

Abstract:

Apparatus for use in tuning a tunable optical device to a target wavelength, the apparatus comprising: a beam splitter for tapping a portion of the light emerging from the tunable optical device; a walk-off reflector for dividing the portion of the light emerging from the beam splitter into a plurality of beams; a multiple etalon for tailoring the light from at least two of the plurality of beams provided by the walk-off reflector; a multiple detector for detecting light from the multiple etalon and the walk-off reflector, the multiple detector providing a plurality of output signals; and a control unit for controlling the tunable optical device by providing a control signal to the tunable optical device according to the output signals provided by the multiple detector.

US Patent:

6934033, Aug 23, 2005

Filed:

Dec 28, 2000

Appl. No.:

09/750204

Inventors:

Donald L. McDaniel - North Andover MA, US
Rong Huang - Woburn MA, US
Parviz Tayebati - Boston MA, US
Reich L. Watterson - Lexington MA, US

Assignee:

Coretek, Inc. - Billerica MA

International Classification:

G01B009/02

US Classification:

356454

Abstract:

Wavelength reference apparatus for use in calibrating a tunable Fabry-Perot filter or a tunable VCSEL, whereby the device may be tuned to a precise, known wavelength, the wavelength reference apparatus comprising an LED, where the LED is chosen so as to have an emission profile which varies with wavelength; an etalon, where the etalon is chosen so as to have a transmission profile which comprises a comb of transmission peaks, with each transmission peak occurring at a precise, known wavelength; and a detector for detecting the light emitted by the LED and passing through the etalon; whereby when a tunable Fabry-Perot filter or tunable VCSEL is positioned between the etalon and the detector, and the device is swept through its tuning range by varying the tuning voltage applied to the device, the known transmission wavelengths established by the LED and the etalon can be correlated to counterpart tuning voltages of the device, whereby to calibrate the device.

US Patent:

20040071181, Apr 15, 2004

Filed:

Jun 24, 2003

Appl. No.:

10/604041

Inventors:

Rong Huang - Westborough MA, US

International Classification:

H01S003/10
H01S003/08

US Classification:

372/106000, 372/020000, 372/092000

Abstract:

Described are optical devices called retro-reflective etalon filter and wide tunable semiconductor lasers using the retro-reflective etalon filter. The reflection optical spectrum of the retro-reflective etalon has the double-pass transmission characteristic of the etalon used within the retro-reflective etalon. The retro-reflective etalon(s) can be used as the reflective end mirror(s) of the wide tunable semiconductor laser. The retro-reflective etalon also can act as the wavelength locker of the laser. The proposed retro-reflective etalon is easy to be manufactured and the wide tunable semiconductor lasers are easy to be implemented by using the retro-reflective etalon.

US Patent:

20050100290, May 12, 2005

Filed:

Jun 9, 2004

Appl. No.:

10/709968

Inventors:

Rong Huang - Westborough MA, US

International Classification:

G02B006/36

US Classification:

385092000, 385088000

Abstract:

A low profile optoelectronic package is provided. The thermal electrical coolers are mounted on the sidewalls of the package box. The sides of the platform on which optical components are disposed are attached on the top surface of the thermal electrical coolers. The overall height of the package is reduced. For an open bottom package box, the platform can be accessed from the bottom.

US Patent:

20050276303, Dec 15, 2005

Filed:

Jun 10, 2004

Appl. No.:

10/709979

Inventors:

rong huang - westborough MA, US

International Classification:

H01S003/08

US Classification:

372106000, 372092000

Abstract:

An laser cavity including a special wavelength selection filter is disclosed. The special wavelength selection filter comprises of one or two linear polarizer, two quarter waveplates, an etalon filter and an end reflector. The laser may oscillate on single wavelength or multiple wavelengths depending on the selection of the end reflector and the etalon filter. The laser is designed very compact without a wavelength locker to have a stable wavelength output.

US Patent:

20060039421, Feb 23, 2006

Filed:

Aug 11, 2004

Appl. No.:

10/710901

Inventors:

Rong Huang - westborough MA, US

International Classification:

H01S 3/10

US Classification:

372020000

Abstract:

A thermally tunable semiconductor laser and a wavelength locker are integrated on one single platform. The temperature of the platform, and the semiconductor, and the wavelength locker is actively adjusted by a thermal electrical cooler. The etalon has a free space range of material dispersion compensated according to the refractive index dependence on the wavelength of the etalon and temperature compensated according to the wavelength dependence of the temperature of the semiconductor laser. The locking point value is adjusted during the operation according to the measured temperature of the etalon.

US Patent:

20070254069, Nov 1, 2007

Filed:

Apr 27, 2006

Appl. No.:

11/412389

Inventors:

Chin-Chi Lin - Taipei, TW
Rong Huang - New York City NY, US

International Classification:

A23L 1/30

US Classification:

426074000

Abstract:

Acid-neutralizing agent contains substantial amount of calcium of an acid-neutralizing ability against various acid chemicals substance for humans, animals, agricultural produces, meat and poultry. And the method of producing the same are provided. An environmental friendly high speed and high press scraping treatment is applied to a calcium-containing substance represented by calcium carbonate-containing substances originating from shellfishes, to eliminate heavy metals and other contamination accumulated on the surface. A heating and baking treatment is applied separately to the different said shellfishes and calcium carbonate-containing minerals and charcoal of bamboo to the temperature and maintaining the temperature not less then the decompose point of each calcium component-containing substance, a sufficient time of heating and baking treatment from 3 hours up to 18 hours depend on materials treated. An ionization and stabilization process is applied to the decomposed calcium components substance in high temperature. A regular pulverizing process is applied to grind the said calcium-containing substance into 500 mesh sizes of powder. A Nano pulverizing process is applied to the said powder into sizes not larger then 18000000 mesh (size of Nano). A formulation process is applied to the different pulverized calcium containing powder in different percentage to formulas which suitable for different applications.