The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2006
Filed:
Jul. 27, 2001
Christopher C. Phillips, London, GB;
Christopher C. Phillips, London, GB;
Imperial College of Science, Technology and Medicine, London, GB;
Abstract
An apparatus () for wavelength shifting light from a first frequency νto a second frequency νis provided in the form of a semiconductor intersubband laser () lasing at its intersubband frequency ν. The output light is wavelength shifted to a frequency ν=ν+nν, where n is a non-zero integer ( . . . , −2, −1, 1, 2, . . . ). The wavelength shifted light νmay be amplitude modulated and/or frequency modulated to impart information upon it. The wavelength shifting is a coherent process allowing for the possibility of coherent communication techniques to be used.