Patent application number | Description | Published |
20080199190 | OPTICAL RECEIVER - An optical receiver comprising: a photoelectric converting unit converting an input optical signal into an converted electrical signal; a splitting unit splitting the converted electrical signal into a plurality of split electrical signals; an amplifier amplifying one of the plurality of the split electrical signals with a first input time constant and thereby outputting an output signal; a detection circuit detecting an interruption of the input optical signal with a second input time constant on the basis of one of the plurality of the split electrical signals other than the one of the plurality of the split electrical signals input to the amplifier and thereby outputting a detection signal; and a delay circuit configured to delay the detection signal; wherein, the second input time constant of the detection circuit is smaller than the first input time constant of the amplifier. | 08-21-2008 |
20090180741 | OPTICAL TRANSMITTING/RECEIVING APPARATUS - An optical transmitting/receiving apparatus capable of suppressing electrical crosstalk and magnetic crosstalk, includes: a laser diode/photo diode (LD/PD) integrated module that terminates a single-core bidirectional optical fiber; a circuit board electrically connected to a lead pin led out of the LD/PD integrated module; and a plastic case that accommodates the circuit board. At least a part of the plastic case abuts against the LD/PD integrated module, and impedance of the plastic case is controlled by mixing a conductive filler into the plastic case. | 07-16-2009 |
20120087652 | OPTICAL COMMUNICATION DEVICE AND POWER-SAVING CONTROL METHOD OF OPTICAL COMMUNICATION DEVICE - A power-saving mode flag generating unit | 04-12-2012 |
20130223838 | TRANSMITTING APPARATUS AND TRANSMITTING METHOD - A transmitting apparatus connected via an optical branching apparatus to an optical communication device group includes a control unit that for each periodic transmission period including a first transmission period with a test period in which the optical communication device group is not allowed to transmit optical signals and a second transmission period without the test period, allows the optical communication device group to transmit the optical signals during a period different from the test period; a test light sending unit that sends test light to the optical branching apparatus during the test period; a light receiving unit that receives optical signals transmitted from the optical communication device group, and reflected light of the sent test light; a measuring unit that measures intensity of the reflected light received at different elapsed times after the test light is sent; and an output unit that outputs information based on the measured intensity. | 08-29-2013 |