Optical receiver with optical demultiplexer

An optical receiver comprising:

• an optical demultiplexer configured to demultiplex an optical signal in which a plurality of wavelengths is multiplexed and to divide the optical signal into optical signals corresponding to the plurality of wavelengths, respectively;
• a plurality of photodetectors configured to receive the divided optical signals and to convert the optical signals to electrical signals;
• and
• a plurality of trans impedance amplifiers configured to amplify the plurality of electrical signals received through the plurality of photodetectors to be a desired magnitude,
• wherein the plurality of photodetectors and the plurality of trans impedance amplifiers are provided at desired intervals with respect to each other, configured to electrically connect to each other through wire bonding, and to be thermally separate by providing a substrate on which the plurality of photodetectors is mounted and a substrate on which the plurality of trans impedance amplifiers is mounted to be separate at a desired distance.

An optical receiver comprising:

• an optical demultiplexer configured to demultiplex an optical signal in which a plurality of wavelengths is multiplexed and to divide the optical signal into optical signals corresponding to the plurality of wavelengths, respectively;
• a reflector configured to change a progress direction of the divided optical signals transferred from the optical demultiplexer;
• an optical coupling lens including, in an array form, light transmission lenses through which the divided optical signals reflected through the reflector are transmitted, respectively;
• a plurality of photodetectors configured to mount on a photodiode (PD) substrate provided on the optical coupling lens, to receive the divided optical signals that are transmitted through the light transmission lenses of the optical coupling lens, respectively, and to convert the received optical signals to electrical signals;
• and
• a plurality of trans impedance amplifiers configured to amplify the plurality of electrical signals received through the plurality of photodetectors to be a desired magnitude,
• wherein the PD substrate includes a plurality of via-holes through which the optical signals transmitted through the light transmission lenses pass, respectively, or is provided as a transparent substrate on which an area allowing the optical signals transmitted through the light transmission lenses to pass is processed with anti-reflection coating.