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91. 发明专利

JPH0237790A SORTING OF SEMICONDUCTOR LASER 失效
公开(公告)号：JPH0237790A
公开(公告)日：1990-02-07
申请号：JP18700888
申请日：1988-07-28
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： WAKABAYASHI SHINICHI , KASAHARA MASAO , NEGISHI HIDEHIKO
IPC分类号： H01L21/66 , H01S5/00 , H04B10/00 , H04B10/07 , H04B10/2507 , H04B10/54 , H04B10/564
摘要： PURPOSE:To easily sort semiconductor lasers whose modulation distortion is small by a method wherein a current-differential quantum efficiency characteristic of a semiconductor laser chip is measured and the semiconductor laser chips are sorted by utilizing a changed amount of differential quantum efficiency in a current region of higher than an oscillation threshold value. CONSTITUTION:This laser is constituted of the following: signal generators 201, 202; a coupler 203; an attenuator 204; a temperature control circuit 205; an optical output control circuit 206; a bias circuit 207; a semiconductor laser module 208; an obliquely polished connector 209; a single-mode fiber 210; a photodetector 211 ; an amplifier 212; a signal analyzer 213; a computer 214 for control use. A signal from the signal generators 201, 202 is applied to the bias circuit 207 and drives the semiconductor laser module 208. An output of the semiconductor laser module 208 is detected by the photodetector 211 via the obliquely polished connector 209 and the single-mode fiber 210; it is amplified by using the amplifier 212; after that, an output signal from the amplifier 212 is analyzed by using the signal analyzer 213. Thereby, the sorting of semiconductor lasers whose modulation distortion is small can be realized easily.

92. 发明专利

JPH0113066B2 失效
公开(公告)号：JPH0113066B2
公开(公告)日：1989-03-03
申请号：JP8763180
申请日：1980-06-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KASAHARA MASAO , INABA RITSUO , WASA KYOTAKA
IPC分类号： G01R19/25 , G01R19/00

93. 发明专利

JPS63299538A OPTICAL SWITCH CIRCUIT 失效
公开(公告)号：JPS63299538A
公开(公告)日：1988-12-07
申请号：JP13510887
申请日：1987-05-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NEGISHI HIDEHIKO , WAKABAYASHI SHINICHI , KASAHARA MASAO
IPC分类号： H04B10/27 , H04B10/00
摘要： PURPOSE:To realize a switching action of optical signals by unifying a light receiving circuit with plural light transmission circuits and adding the driving circuits and the logic circuits for those reception and transmission circuits respectively so that plural light emitting elements contained in the light transmission circuit are selectively modulated by the light receiving current received from the light receiving circuit. CONSTITUTION:When an optical signal is made incident on a light receiving element 101, a minute electric signal is obtained from the element 101 to which a bias current is applied. This electric signal is amplified by an amplifying circuit 201 and undergoes the waveform shaping. Then a clock signal is extracted out of the electric signal by a logic circuit 301 of the next stage and the ON/OFF control is carried out for the gate of the circuit 301. Thus the electric signals are selectively sent to plural light emitting elements 4031-403n for modulation. As a result, the elements 4031-403n which receive the bias application from a power supply 402 up to the oscillating threshold level are modulated and transmitted through optical fibers 4051-405n as optical signals. Thus it is possible to obtain an optical switch circuit which can optionally connect a single input optical signal to plural lines.

94. 发明专利

JPS63299537A OPTICAL SIGNAL CHANGEOVER SWITCH 失效
公开(公告)号：JPS63299537A
公开(公告)日：1988-12-07
申请号：JP13509987
申请日：1987-05-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KASAHARA MASAO , NEGISHI HIDEHIKO , WAKABAYASHI SHINICHI , KAWAKAMI KATSURA , MISAWA MOTOHIRO
IPC分类号： G02B6/00 , G02B6/12 , G02F1/31 , G02F1/313 , H04B10/07 , H04B10/27 , H04B10/29
摘要： PURPOSE:To switch the high-speed/wide-band information signals without losing the high-speed properties by using plural output circuits which produce the answer outputs in response to plural discrimination pulses and detecting a switch changeover signal out of a digital optical reception signal when the coincidence is secured between the output forms of said output circuits and a prescribed signal form. CONSTITUTION:An electric switch driving circuit 2 is set at an optional time position in an optical digital pulse train and this circuit 2 owns plural discriminator pulses and a detector for detection of these pulses. An optical switch is driven by the circuit 2 when the coincidence is secured between the form of the discrimination pulse and the form of the detector. Then the corresponding optical switch circuit 3 is opened and the digital pulse train passes through the circuit 3. In such a constitution, the optical digital pulse signals which are supplied continuously and at high speed can be processed in parallel even with a low-speed signal processing circuit which is so far unable to process those digital pulse signals with no deterioration of the high-speed properties. In addition, the high-speed processing is possible with a latch function added to a buffer amplifier.

95. 发明专利

JPS63299512A SWITCH FOR HIGH-SPEED DIGITAL SIGNAL 失效
公开(公告)号：JPS63299512A
公开(公告)日：1988-12-07
申请号：JP13511187
申请日：1987-05-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KASAHARA MASAO , WAKABAYASHI SHINICHI , NEGISHI HIDEHIKO , KAWAKAMI KATSURA , MISAWA MOTOHIRO
IPC分类号： H03K17/00 , H04B10/00 , H04B10/27 , H04L25/40
摘要： PURPOSE:To switch the high-speed/wide-band optical information signal without losing the high speed properties by using a switch means which undergoes the control of its actions via a detecting means that compares the form of an identifying pulse signal with another prescribed signal form and then allocates the digital pulse trains in response to the identifying pulse signal. CONSTITUTION:The output signal of a photo-electric converting circuit 1 is supplied to a detecting circuit 2 containing an identifying pulse detector. The circuit 2 identifies the identifying pulse signal and the form of this pulse signal is compared with the pulse form the circuit 2. As a result, a switch circuit 3 is actuated to lead signals to the branches where the pulse trains are allocated. Then the signals are led to buffer amplifiers 4-7. The signals stored in the buffer amplifiers are supplied to signal discriminators 8-11 and discriminated there. These discriminated signals are extracted as outputs. Thus the digital signals can be processed in parallel by a low-speed signal processing circuit with use of a switch means and also processed at a high speed by adding a latch function to the buffer amplifier.

96. 发明专利

JPS63198821A ULTRASONIC GYROSCOPE 失效
公开(公告)号：JPS63198821A
公开(公告)日：1988-08-17
申请号：JP3171587
申请日：1987-02-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KASAHARA MASAO , ABE TOMOKO
IPC分类号： G01C19/58
摘要： PURPOSE:To easily perform position detection by providing an electrode for detection between interdigital electrodes provided opposite the surface of a piezoelectric body and shifting the phase of a signal applied to one interdigital electrode so that the output signal of the electrode for detection becomes maximum. CONSTITUTION:The two interdigital electrodes 2 and 3 are formed on the surface of the piezoelectric plate 1 and the electrode 4 for detection is provided between the both. When high frequency signals are inputted from signal generators 5 and 6 to the electrodes 2 and 3, a signal of frequency twice as high as the oscillation frequency of the signal generators 5 and 6 is obtained from the electrode 4. This signal is fed back to a phase shifter 7 connected to the signal generator 5 through a detector 8 and the quantity of phase shifting is so adjusted that the signal from the electrode 4 is maximum. The quantity of phase shifting with which the output of the electrode 4 is maximum varies according to external conditions, so this quantity of phase shifting is found to easily detect physical transition.

97. 发明专利

JPS63198394A MOUNTING JIG FOR SEMICONDUCTOR LASER 失效
公开(公告)号：JPS63198394A
公开(公告)日：1988-08-17
申请号：JP3171687
申请日：1987-02-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ABE TOMOKO , KASAHARA MASAO
IPC分类号： H01L21/66 , H01S5/00 , H01S5/022
摘要： PURPOSE:To accurately measure a light output by a method wherein a focusing plate equipped with a lens is installed at the output side of a jig which is used to mount a semiconductor laser to an electrode. CONSTITUTION:A mounting jig 8 to be installed on a jig to hold a specimen is provided in such a way that it can fix a spherical lens 5 and that it can serve as a spacer having a thickness capable of adapting the interval between the output end of a laser and the lens 5 to the focal distance of the lens 5. If the spherical lens 5 is more than 3 phi, it is possible to keep the interval of about 1 mm. If a screw 6 is brought into alignment with a threaded hole 7 and is fixed, it is possible to obtain a focused beam easily; it is possible to converge the total light output to a photodetecting part inside a screening system. By this setup, it is possible to measure the light output accurately.

98. 发明专利

JPS6257973B2 失效
公开(公告)号：JPS6257973B2
公开(公告)日：1987-12-03
申请号：JP14721480
申请日：1980-10-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： INABA RITSUO , KASAHARA MASAO , WASA KYOTAKA
IPC分类号： G02F1/055 , G02F1/03

99. 发明专利

JPS6054724B2 失效
公开(公告)号：JPS6054724B2
公开(公告)日：1985-12-02
申请号：JP6814779
申请日：1979-05-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MITSUYU TSUNEO , WASA KYOTAKA , KASAHARA MASAO
IPC分类号： H01G4/12 , G01K7/34 , H01B3/12 , H01G7/04

100. 发明专利

JPS6035227A INFRARED-RAY RADIATION THERMOMETER 失效
公开(公告)号：JPS6035227A
公开(公告)日：1985-02-23
申请号：JP14405383
申请日：1983-08-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OUCHI KENZOU , INABA RITSUO , KASAHARA MASAO
IPC分类号： G01J5/02 , G01J5/44
摘要： PURPOSE:To obtain a highly reliable, high-performance, infrared-ray radiation thermometer, by the constitution wherein a thickness of a piezoelectric substrate is more than 30mum and less than 60mum, and the surface roughness of the back surface of the piezoelectric substrate is less than 0.2mum. CONSTITUTION:An LiNbO3 single crystal plate is used as a piezoelectric substrate 13. The propagating direction of an elastic surface wave is the direction of a Z axis. Cross finger type electrodes 11 and 12 are formed by an evapolated Al film with a thickness of about 0.15mum. The interval between the electrodes is about 3mm.. The thickness of the substrate 13 is more than 30mum and less than 60mum. The surface roughness of the back surface of the substrate 13 is less than 0.2mum. Thus a highly reliable, high-performance oscillator can be implemented, and an excellent infrared-ray radiation thermometer can be implemented.

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