Optical amplifier

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12085836
APP PUB NO 20230236473A1
SERIAL NO

18010899

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

An optical amplifier of the present disclosure includes a Raman amplification unit and a parametric amplification unit that is configured of a second-order nonlinear element including a PPLN waveguide. In the optical amplifier, second harmonic lights are generated from a fundamental wave light having a wavelength that is slightly detuned to a shorter wavelength side with respect to a phase matching wavelength of the second-order nonlinear element, and is utilized as excitation light for the parametric amplification unit. By utilizing the excitation light based on the fundamental wave light of the wavelength detuned from the phase matching wavelength, a phase matching curve can be obtained in a wide band in a difference frequency generation (DFG) process of the second-order nonlinear element. The reduction in conversion efficiency of the wavelength near the excitation light in the parametric amplification unit is compensated by the Raman amplification unit.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
NIPPON TELEGRAPH AND TELEPHONE CORPORATIONTOKYO 100-8116

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Embutsu, Koji Musashino, JP 23 16
Inoue, Asuka Musashino, JP 16 5
Kasahara, Ryoichi Musashino, JP 53 96
Kashiwazaki, Takahiro Musashino, JP 27 16
Kazama, Takushi Musashino, JP 32 22
Koshobu, Nobutatsu Musashino, JP 20 5
Tadanaga, Osamu Musashino, JP 35 116
Umeki, Takeshi Musashino, JP 29 80

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Mar 10, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 10, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 10, 2036
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00