Ying Wang

US Patent:

6377410, Apr 23, 2002

Filed:

Oct 1, 1999

Appl. No.:

09/410417

Inventors:

Zhijiang Wang - Diamond Bar CA
Alice Z. Gheen - Irvine CA
Ying Wang - Diamond Bar CA

Assignee:

Apollo Instruments, Inc. - Irvine CA

International Classification:

H01S 3091

US Classification:

359837, 372 75, 385 33, 385 36, 359850

Abstract:

Method and apparatus are disclosed for beam dividing and shaping, in which the beams from laser diode array are divided in a plurality of sections along the slow axis and the sections of beams are then recombined along their fast axis so that the Lagrange invariant of the resulting beam increased approximately by n-fold in fast axis and reduced approximately by n-fold in slow axis. With the inclusion of above apparatus in diode laser modules, the main objectives of constructing high-efficiency solid state lasers can be achieved. Thus, a high-efficiency diode-pumped solid state laser apparatus can be made, comprising a laser fiber, at least one laser diode array module, an imaging optical system, wherein said imaging optical system is disposed between said module and the aperture of said fiber and focuses the beam from said module onto the aperture of said laser fiber, and wherein said laser diode array module comprises at least one laser diode array, a collimating structure, a beam dividing/rearranging device and an optical relay system.

US Patent:

6462883, Oct 8, 2002

Filed:

Aug 23, 2000

Appl. No.:

09/644804

Inventors:

Zhijiang Wang - Diamond Bar CA
Qinyue Yu - Tustin CA
Ying Wang - Diamond Bar CA

Assignee:

Apollo Instruments Inc. - Irvine CA

International Classification:

G02B 2730

US Classification:

359641, 372108

Abstract:

In the present invention, the methods and apparatus for making efficient laser beam coupling are disclosed. In particular, new structures for shaping and rearranging laser beams from diode laser array are disclosed. Along with the use of unique methods for coupling pumping laser beam into optical fiber or other media, high efficiency can be achieved. These aspects of the present invention will facilitate the realization of high-efficiency and high-power fiber lasers or other solid state lasers. The beam shaping structures can significantly improve the quality of the beams from diode laser array, and is easy to realize and less demanding in system alignment. Thus, a diode-pumped solid state laser of this invention may comprise a laser medium, a focusing means, a beam source comprising at least one laser diode array, a beam offsetting means, an image optics and a beam redirection means.

US Patent:

6556352, Apr 29, 2003

Filed:

Jan 10, 2001

Appl. No.:

09/758876

Inventors:

Zhijiang Wang - Diamond bar CA
Qinyue Yu - Tustin CA
Ying Wang - Diamond bar CA

Assignee:

Apollo Instruments Inc. - Irvine CA

International Classification:

G02B 2730

US Classification:

359641

Abstract:

In the present invention, the methods and apparatus for making efficient laser beam coupling are disclosed. In particular, new structures for shaping and rearranging laser beams from diode laser array are disclosed. Along with the use of unique methods for coupling pumping laser beam into optical fiber or other media, high efficiency can be achieved. These aspects of the present invention will facilitate the realization of high-efficiency and high-power fiber lasers, fiber amplifiers, or other solid state lasers. The beam shaping structures can significantly improve the quality of the beams from diode laser array, and is easy to realize and less demanding in system alignment. Thus, a diode-pumped solid state laser of this invention may comprise a laser medium, a focusing means, a beam source comprising at least one laser diode array, a beam offsetting means, an image optics and a beam redirection means.

US Patent:

6816513, Nov 9, 2004

Filed:

Apr 2, 2001

Appl. No.:

09/824188

Inventors:

Zhijiang Wang - Diamond bar CA
Ying Wang - Diamond bar CA
Alice Gheen - Irvine CA

Assignee:

Apollo Instruments, Inc. - Irvine CA

International Classification:

H01S 3067

US Classification:

372 6, 385123, 385126

Abstract:

In the present invention, methods and apparatus for making efficient cladding pumping fiber lasers is disclosed. In particular, new fiber cladding geometry and method of construct fiber lasers and amplifiers using the laser fibers of the current invention are disclosed. The aspects of the present invention will facilitate the realization of high-efficiency and high-power fiber lasers and amplifiers. In the present invention, cladding boundary geometry structures that can prevent the formation of local modes are disclosed. Thus the pumping laser coupling method can be used for the construction of high-efficiency fiber lasers. Thus, the fiber lasers of this invention may comprise a laser fiber with its core doped with active species, having an asymmetric and symmetry-broken inner cladding or a multiple-imaging inner cladding surrounding said core, a laser diode array, reflector means at both ends of said laser fiber, and coupling optical system disposed between said laser diode array and the aperture of said laser fiber for coupling the pump beam from said laser diode array through a reflector into said inner cladding.

US Patent:

6831934, Dec 14, 2004

Filed:

May 15, 2002

Appl. No.:

10/147023

Inventors:

Zhijiang Wang - Diamond Bar CA
Ying Wang - Diamond Bar CA

Assignee:

Apollo Instruments, Inc. - Irvine CA

International Classification:

H01S 330

US Classification:

372 6, 385126, 385127

Abstract:

A double cladding fiber includes an inner core doped with active species, an inner cladding disposed adjacent said inner core for receiving pumping energy, minimizing local modes in said inner cladding, and transferring said pumping energy to the core. An outer cladding is disposed adjacent the inner cladding. The cross section of said inner cladding has a polygon-like shape with its boundary being a plurality of well-defined arcs, each of the arcs having substantially different arc center for delivering energy with maximum efficiency to the inner core meeting the limitation of: or where r1 and r2 is the arc radius of the inner cladding surfaces that are opposite to each other (mirror pair), with the radius of a concave mirror being positive and that of a convex mirror being negative, L is the distance between two mirrors.

US Patent:

7119232, Oct 10, 2006

Filed:

Mar 22, 2005

Appl. No.:

11/086723

Inventors:

G. K. Surya Prakash - Hacienda Heights CA, US
Jinbo Hu - Shanghai, CN
George A. Olah - Beverly Hills CA, US
Ying Wang - Los Angeles CA, US

Assignee:

University of Southern California - Los Angeles CA

International Classification:

C07C 317/14

US Classification:

568 24

Abstract:

(Benzenesulfonyl)difluoromethyl anion, in situ generated from difluoromethyl phenyl sulfone and a base, was found to easily undergo nucleophilic substitution reactions (S2) with primary alkyl halides, elemental halogens, and perfluoroalkyl halides with good selectivity. The formed (benzenesufonyl)difluoromethylalkanes are useful intermediates for the facile preparation of 1,1-difluoro-1-alkenes and difluoromethylalkanes. Thus, difluoromethyl phenyl sulfone acts as both “CF═” and “CFH” synthons.

US Patent:

RE40019, Jan 22, 2008

Filed:

Aug 1, 2002

Appl. No.:

10/211490

Inventors:

Zhijiang Wang - Diamond Bar CA, US
Alice Z. Gheen - Irvine CA, US
Ying Wang - Diamond Bar CA, US

International Classification:

H01S 3/30

US Classification:

372 6, 372 66, 372700, 385123

Abstract:

p-00010000.

US Patent:

8014433, Sep 6, 2011

Filed:

Oct 7, 2008

Appl. No.:

12/246674

Inventors:

Zhijiang Wang - Diamond Bar CA, US
Ying Wang - Diamond Bar CA, US

Assignee:

Apollo Instruments - Irvine CA

International Classification:

H01S 3/091

US Classification:

372 70, 372 93, 372 99

Abstract:

A large number of passes of pump light through an active mirror in a solid state disk laser is realized using a pair of coupled imaging systems, where the optical axes of imaging systems are not coincident. Two imaging systems are optically coupled, so that an image of the first imaging system is an object of the second imaging system, and vice versa. An active mirror is disposed at the object or image plane, or at the focal plane of any one of the coupled imaging systems, where the position of the reflected pump beam during the multi-reflection between the first and second imaging systems is substantially unchanged.