Patents by Inventor Liang David Tzeng

Liang David Tzeng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical transponders and transceivers
    Patent number: 7031612
    Abstract: An optical transponder/transceiver for intermediate range (e.g., 10-50 km) optical communication applications utilizes an electroabsorption modulated laser for the transmitting device. Preferably, the laser operations at a wavelength of approximately 1310 nm and comprises an electroabsorption modulated Fabry-Perot laser.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: April 18, 2006
    Assignee: Multiplex, Inc.
    Inventors: Kang-Yih Liou, Tawee Tanbun-Ek, Won-Tien Tsang, Liang David Tzeng
  • Electroabsorption-modulated fabry perot laser
    Patent number: 6597718
    Abstract: An electroabsorption modulated laser (EML) is formed to include a Fabry-Perot lasing section, in place of the conventional DFB lasing section. When operated at a wavelength of 1310 nm, the wider spectral bandwidth of the FP device (containing several longitudinal modes) is of no concern, since 1310 nm is the zero dispersion wavelength of most conventional transmission fibers. A selective area growth process is used to simultaneously form the MQW active regions of both the FP and EA sections of the EML device, and an isolation trench may be formed between the sections to reduce the effects of electrical crosstalk.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: July 22, 2003
    Assignee: Multiplex, Inc.
    Inventors: Tawee Tanbun-Ek, Won-Tien Tsang, Liang David Tzeng
  • Optical transponders and transceivers
    Publication number: 20020060824
    Abstract: An optical transponder/transceiver for intermediate range (e.g., 10-50 km) optical communication applications utilizes an electroabsorption modulated laser for the transmitting device. Preferably, the laser operations at a wavelength of approximately 1310 nm and comprises an electroabsorption modulated Fabry-Perot laser.
    Type: Application
    Filed: July 17, 2001
    Publication date: May 23, 2002
    Inventors: Kang-Yih Liou, Tawee Tanbun-Ek, Won-Tien Tsang, Liang David Tzeng
  • Electroabsorption-modulated fabry perot laser
    Publication number: 20020009114
    Abstract: An electroabsorption modulated laser (EML) is formed to include a Fabry-Perot lasing section, in place of the conventional DFB lasing section. When operated at a wavelength of 1310 nm, the wider spectral bandwidth of the FP device (containing several longitudinal modes) is of no concern, since 1310 nm is the zero dispersion wavelength of most conventional transmission fibers. A selective area growth process is used to simultaneously form the MQW active regions of both the FP and EA sections of the EML device, and an isolation trench may be formed between the sections to reduce the effects of electrical crosstalk.
    Type: Application
    Filed: July 17, 2001
    Publication date: January 24, 2002
    Inventors: Tawee Tanbun-Ek, Won-Tien Tsang, Liang David Tzeng