Patent ID: 8428473

Claim:
An apparatus for generating a millimeter wave signal for use in optical data transmission, the apparatus comprising of: a light source ( 101 ) that generates a variable multi-wavelength optical signal; a first amplifier ( 102 ) that amplifies the optical signal; a means ( 103 ) that splits the amplified optical signal; a means ( 104 , 105 ) that filters and tunes the split optical signals; a coupler ( 107 ) that combines the optical signals resulting in the dual wavelength optical signal with the wavelength separation (Δλ) equivalent to the millimeter wave signal of desired frequency in the electrical domain; a second amplifier ( 108 ) that amplifies and gain flattens the dual wavelength optical signal output of the coupler ( 107 ); a photo-detector ( 109 ) that converts the amplified dual wavelength optical signal into the millimeter wave signal by way of heterodyning; characterized in that the apparatus further includes a controller ( 106 ) for stabilizing the millimeter wave electrical signal output, wherein the controller ( 106 ) controls the number of stoke lines emitted by the light source ( 101 ), the gain of the amplifying means ( 102 , 108 ) and the tuning of the filtering means ( 104 , 105 ) based on the electrical millimeter wave output.