Patent ID: 7064891
Filing Date: 2006-06-20
Classification: B82Y,G02F,H01S

Abstract:
1. An optical function element comprising: a semiconductor optical amplifying element configured to receive only an input laser light of a first wavelength, and intensity-modulate a light having a wavelength within a wavelength band which includes said first wavelength of said input laser light and in which said semiconductor optical amplifying element has an amplification gain, such that said light having the wavelength within said wavelength band is intensity-modulated in response to a variation in an intensity of said input light; in a phase reversed with respect to said input laser light; an optical feedback element configured to effect positive feedback of a portion of an output to said optical amplifying element to said optical amplifying element; and a wavelength extracting element operable to extract a light of a second wavelength from a light generated within said optical amplifying element, to output an output light of said second wavelength.