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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Yoshida; Setsuo
Address:
Kawasaki, JP
No. of patents:
10
Patents:












Patent Number Title Of Patent Date Issued
8564878 Optical amplifier, control circuit, and optical amplifier control method October 22, 2013
An optical amplifier includes a semiconductor optical amplifier, a power monitor configured to monitor an optical power of out-of-signal-band noise output from the semiconductor optical amplifier, and a corrector configured to correct a relationship between a driving current for the
8179593 Optical-switch drive circuit and method thereof May 15, 2012
An optical-switch drive circuit including a driver unit that generates, in response to a control signal, an on/off signal for driving a semiconductor optical amplifier gate switch, and a buffer unit having a high input impedance and connected between an output terminal outputting the
8139903 Driving circuit of optical gate switch March 20, 2012
A driving circuit of a semiconductor optical amplifier type gate switch constituting a matrix optical switch is provided with an operation amplifier into which a driving signal is input and from which a current corresponding to the driving signal is output, an inductance element prov
8107813 Drive circuit and optical switch January 31, 2012
A drive circuit includes a first transistor that is controlled to be in on or off state in response to a control signal, and outputs, in on state, a positive current which is input from a first operational amplifier connected with a drain of the first transistor to a semiconductor op
7898341 Non-inverting amplifier circuit and optical switch driver circuit March 1, 2011
A non-inverting amplifier circuit is disclosed that includes an operational amplifier and a preemphasis circuit connected between the operational amplifier and a signal source. The preemphasis circuit is configured to compensate for the internal delay of a load connected to the outpu
7848600 Driving circuit of optical gate switch December 7, 2010
A driving circuit of a semiconductor optical amplifier type gate switch constituting a matrix optical switch is provided with an operation amplifier into which a driving signal is input and from which a current corresponding to the driving signal is output, an inductance element prov
7822204 Encryption method, cryptogram decoding method, encryptor, cryptogram decoder, transmission/recep October 26, 2010
An encryption technique allowing use of classic Y-00 scheme performed using classic physical random numbers instead of quantum fluctuation in electrical communication and data storage in recording media, including a first modulation step for multilevel-modulating input data by associatin
7791793 Semiconductor optical amplifier gate switch drive circuit, semiconductor optical amplifier gate September 7, 2010
A drive circuit is provided for a semiconductor optical amplifier type gate switch includes a first transmission path and a second transmission path. The first transmission path includes a common first sub-path between a signal source and a first node; and an individual second sub-pa
7471790 Encryption method, cryptogram decoding method, encryptor, cryptogram decoder, and communication December 30, 2008
An encryption technique having a greater encryption strength than conventional mathematical encryption by using classic physical random numbers etc., including a step for modulating one-bit input data into a coded signal by associating it with a discrete value of at least two bits de
7408700 Optical switch, and method for controlling drive voltage thereof August 5, 2008
An optical switch which minimizes losses in the power of output light while enabling deflection of light within a range of comparatively large deflection angles used for setting switching among output ports. The optical switch is configured to have a first light deflection element de










 
 
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