Lanny M Laughman, 7620 Rosewood Ln, Manchester, CT 06043

H199, Jan 6, 1987

Mar 18, 1985

6/712943

Peter P. Chenausky - Avon CT
Erroll H. Drinkwater - Portland CT
Lanny M. Laughman - Bolton CT

The United States of America as represented by the Secretary of the Army - Washington DC

E04B 116

51326

A method of fabricating CO. sub. 2 waveguide type lasers of the type comprising a slot formed in a broad surface of a hard ceramic material, comprising grinding the slot in a conventional surface grinding machine in two steps. The first step utilizes a coarse grinding wheel and the second a finer grinding wheel. The resultant laser cavity can produce high optical power output when provided with RF excitation.

6697408, Feb 24, 2004

Apr 4, 2002

10/116360

John T. Kennedy - Granby CT
Richard A. Hart - North Granby CT
Lanny Laughman - Bolton CT
Joel Fontanella - Tolland CT
Anthony J. Demaria - West Hartford CT
Leon A. Newman - Glastonbury CT
Robert Henschke - East Hampton CT

Coherent, Inc. - Santa Clara CA

H01S 322

372 55, 372 10, 372 27, 372 321, 372 8, 372 98, 372 29012

This disclosure discusses techniques for obtaining wavelength selected simultaneously super pulsed Q-switched and cavity dumped laser pulses utilizing high optical damage threshold electro-optic modulators, maintaining a zero DC voltage bias on the CdTe electro-optic modulator (EOM) so as to minimize polarization variations depending on the location of the laser beam propagating through the CdSe EOM crystal, as well as the addition of one or more laser amplifiers in a compact package and the use of simultaneous gain switched, Q-switched and cavity dumped operation of CO lasers for generating shorter pulses and higher peak power for the hole drilling, engraving and perforation applications.

6798816, Sep 28, 2004

Oct 21, 2002

10/277272

Anthony J. DeMaria - Hartford CT
Vernon A. Seguin - Windsor CT
Lanny Laughman - Bolton CT

Coherent, Inc. - Santa Clara CA

H01S 303

372 64, 372 55, 372 7, 372 46

A folded waveguide CO laser includes a plurality of waveguides arranged in a zigzag pattern with ends thereof overlapping. The laser includes a resonator having an axis extending through the plurality of waveguides. At least a portion of at least one of the waveguides has a uniform minimum width selected cooperative with the height of the waveguide and the laser wavelength such that the resonator can oscillate in only a single mode. At least a portion of one of the waveguides is tapered such that its width increases in one direction along the resonator axis. Tapering one or more of the waveguides provides that the total waveguide area and potential power output of the laser is greater than that of a zigzag arrangement of waveguides having the same total length waveguides each having a uniform width equal to the minimum width of the waveguide in the tapered waveguide arrangement.

6826204, Nov 30, 2004

Apr 4, 2002

10/116392

John T. Kennedy - Granby CT
Richard A. Hart - North Granby CT
Lanny Laughman - Bolton CT
Joel Fontanella - Tolland CT
Anthony J. Demaria - West Hartford CT
Leon A. Newman - Glastonbury CT
Robert Henschke - East Hampton CT

Coherent, Inc. - Santa Clara CA

H01S 311

372 10, 372 55, 372 93

A simultaneously super pulsed Q-switched CO laser system for material processing is disclosed. The system comprises sealed-off folded waveguides with folded mirrors that are thin film coated to select the output wavelength of the laser. The system also comprises a plurality of reflective devices defining a cavity; a gain medium positioned within the cavity for generating a laser beam; a cavity loss modulator for modulating the laser beam, generating thereby one or more laser pulses; a pulsed signal generation system connected to the cavity loss modulator for delivering pulsed signals to the cavity loss modulator thereby controlling the state of optical loss within the cavity; a control unit connected to the pulsed signal generation system for controlling the pulsed signal generation system; and a pulse clipping circuit receptive of a portion of the laser beam and connected to the pulsed signal generation system for truncating a part of the laser pulses.

6999490, Feb 14, 2006

Jul 21, 2003

10/624411

John Kennedy - Granby CT, US
Lanny Laughman - Bolton CT, US
Anthony DeMaria - West Hartford CT, US
Ronald Straayer - South Windsor CT, US

Coherent, Inc. - Santa Clara CA

H01S 3/223
H01S 3/03
H01S 3/097

372 55, 372 64, 372 86

A waveguide gas laser includes an enclosure filled with a lasing gas. A ceramic block is provided with one or more waveguide channels. At least one of the waveguide channels includes an open region which is in fluid communication with a waveguide channel. Lasing gas in the enclosure fills the waveguide channels and the lateral extension. An electric field is applied across the lateral extension of the waveguide channel while simultaneously applying a smaller electric field across the waveguide channel. The electric field across the lateral extension ignites a discharge in the lateral extension that spreads into the lasing gas in the waveguide channel. The electric field across the waveguide channel is sufficient to sustain the discharge in the lasing in the waveguide channel.

7058093, Jun 6, 2006

Dec 19, 2003

10/742563

John T. Kennedy - Granby CT, US
Richard A. Hart - North Granby CT, US
Lanny Laughman - Bolton CT, US
Joel Fontanella - Tolland CT, US
Anthony J. DeMaria - West Hartford CT, US
Leon A. Newman - Glastonbury CT, US
Robert Henschke - East Hampton CT, US

Coherent, Inc. - Santa Clara CA

H01S 3/11
H01S 3/115

372 10, 372 12

This disclosure discusses techniques for obtaining wavelength selected simultaneously super pulsed Q-switched and cavity dumped laser pulses utilizing high optical damage threshold electro-optic modulators, maintaining a zero DC voltage bias on the CdTe electro-optic modulator (EOM) so as to minimize polarization variations depending on the location of the laser beam propagating through the CdSe EOM crystal, as well as the addition of one or more laser amplifiers in a compact package and the use of simultaneous gain switched, Q-switched and cavity dumped operation of COlasers for generating shorter pulses and higher peak power for the hole drilling, engraving and perforation applications.

7280569, Oct 9, 2007

Jul 8, 2004

10/886902

Lanny Laughman - Bolton CT, US
Joseph S. Smucz - East Hartford CT, US
Vernon A. Seguin - Windsor CT, US
Raymond Michaud - Lebanon CT, US

Coherent, Inc. - Santa Clara CA

H01S 3/115

372 12, 372 35

Various electro-optical modulator module designs are presented, which can provide for uniform, symmetric, and efficient heat removal for mode-locking, Q-switching, and/or cavity dumping operations. Heat can be uniformly extracted from an EO crystal without imposing undue stress, thereby preventing birefringence and laser beam degradation. A liquid-cooling approach can be used for high-duty operations, such as mode-locking operations. Efficient heat removal can prevent thermal run-away from electrical heating of the crystal due to the large drop in the electrical resistance of CdTe with increasing temperature when operated above 50 C. RF or video arcing and subsequent damage to the EO crystal can be prevented by surrounding the crystal with a low dielectric constant material that lowers the capacitance coupling to ground, while still maintaining good thermal cooling.

7453918, Nov 18, 2008

Jul 12, 2006

11/484916

Lanny Laughman - Bolton CT, US
Vernon Seguin - Windsor CT, US
Peter P. Chenausky - Avon CT, US
Robert Henschke - East Hampton CT, US
Eric R. Mueller - West Suffield CT, US

Coherent, Inc. - Santa Clara CA

H01S 3/22

372 55, 372 61

An improved laser system includes a sealed-off, RF excited, diffusion cooled, high pressure, short pulsed, high peak power waveguide and slab COlaser that avoids problems typically associated with obtaining a diffused discharge at high gas pressures, without arcing and without corona, while maintaining the unsaturated gain and gas temperature experienced at low pressures and scaling to higher pressures. Such a system has a long operating life-time, and is capable of operation at high gas pressures to obtain relative fast rise and fall time pulses. The system emits relatively short pulse widths, with pulse energies up to and exceeding 30 mJ, with reasonably high pulse repetition rates. The system also has a low pulsed RF power duty cycle, thereby enabling the generation of high peak power pulses, as well as reasonable average power and reasonably high peak powers.