F-Term-List

H04B10/00-10/90;H04J14/00-14/08,130

AA00
PURPOSE OR PROBLEMS

AA01

AA02

AA03

AA04

AA05

AA06

AA07

AA08

AA10

. Measures against noise (S/N or C/N), distortion, or signal deterioration

. Capacity increasing for communication capacitance

. . Multiplexing (Increasing multiplex number, e.g. multiwavelength)

. . Increased capacity per wavelength

. . Increased capacity by electrical stages

. . Increased capacity by optical stages

. . Increased capacity (Increased density) by constant bandwidth

. Reduction or limitation of bandwidth

. Distance lengthening for transmission ranges

AA11

AA12

AA13

AA15

AA16

AA17

AA18

AA19

AA20

. Economy improvement

. Effective uses of existing facilities.

. Prolonging lives, or measures against aging degradation for optical devices

. Downsizing, weight reduction, or simplification of constructions

. Sharing one single optical device

. Power saving

. . Using constructions (circuits) of reduced power consumption

. . With control means

. . . Reducing or stopping operations of circuits

AA21

AA22

AA23

AA24

AA25

AA26

AA27

AA28

. Improvement of characteristics of optical space transmission

. . Optical axis adjustment for optical space transmission

. . . Initial setting

. . . Automatic tracking

. . Change of beam diameters

. . Expanding communicable areas, or securing communication paths

. . . Using a plurality of light sources

. . . Combined with means other than optical space transmission

AA31

AA32

AA34

AA35

AA36

AA37

AA38

. Optical axis adjustment between optical devices

. Securing communication for works or constructions

. Extension, or changes of networks

. . Facilitation or cost reduction

. . Nodes, OADM, or OXC

. . Wavelength multiplex number

. . Connections with other networks

AA41

AA42

AA43

AA44

AA45

AA46

AA47

AA48

AA49

AA50

. For faults or troubles

. . Detection of fault or trouble contents

. . Specifying fault or trouble positions

. . Restoration from faults or troubles

. . Notification, or report of faults or troubles

. . Aiming at fault or trouble detection with high accuracy

. Considering influences on human bodies

. . For protecting eyes

. Waveform shaping

. . All-optical type waveform shaping

AA51

AA52

AA53

AA54

AA55

AA56

AA57

. Improvement of characteristics peculiar to transmitters

. Improvement of characteristics peculiar to receivers

. Improvement of features peculiar to amplifiers or repeaters

. . Band broadening

. . Flattening of amplification characteristics

. . High outputting

. . Noise reduction

AA61

AA63

AA65

AA67

AA68

AA69

. Problems peculiar to modulation-demodulation systems, or codes

. Synchronizing or transmitting clocks

. For burst communication

. Elimination of polarization or polarization dependency

. For environmental changes such as temperature changes

. Error corrections

AB00
SERVICES OR APPLICATIONS

AB01

AB02

AB03

AB04

AB05

AB06

AB07

AB08

AB09

AB10

. Image signal transmission

. . CATV

. HFC (Hybrids Fiber and Coaxial)

. Voice signal transmission

. Remote control (only characterized by optical transmission)

. Undersea optical transmission

. Optical transmission of satellite

. Optical LAN

. . Wireless optical LAN

. . Wired optical LAN

AB11

AB12

AB13

AB14

AB15

. Quantum cryptography

. Optical transmission of moving bodies between base stations

. . Optical signal supply to antennae at remote places

. Photonic networks

. Local optical communication between substrates, between electronic components, or the like

AC00
STANDARDS

AC01

AC02

AC03

AC04

. SONET/SDH

. GbE

. IrDA

. IEEE1394

AD00
MULTIPLEXING

AD01

AD02

AD04

AD05

AD06

AD07

. Wavelength multiplexing (Optical frequency multiplexing)

. . Treating as wavelength groups.

. Electrical frequency multiplexing

. . Subcarrier multiplexing (SCM)

. . Frequency batch multiplexing

. . Analog and digital hybrid multiplexing

AD11

AD12

AD13

AD14

AD15

. Electrical time-division multiplexing

. Optical time-division multiplexing

. Electrical code-division multiplexing (CDM)

. Optical code-division multiplexing (OCDM)

. Multiplexing systems for polarization of waves or light

AH00
OPTICAL MODULATION AND DEMODULATION

AH01

AH02

AH03

AH04

AH05

AH06

. Direct modulation

. External modulation

. Optical solitons

. Carrier suppression modulation (CS modulation)

. SSB modulation or DSB modulation

. Optical duo-binary modulation

AH11

AH12

AH13

AH14

AH15

AH16

AH17

AH18

. Coherent systems

. . Heterodyne

. . Homodyne

. . Using optical local oscillators

. . Using electrical local oscillators

. . Characterized by arrangement positions of local oscillators

. . . Receiving ends

. . . Transmitting ends

AH21

AH22

AH23

AH24

AH26

AH27

AH29

AH30

. Analog modulation systems

. Digital modulation systems

. . Pulse modulation

. . Multivalue signals having three or more codes

. Intensity modulation or amplitude modulation

. Frequency modulation or phase modulation

. Simultaneously using a plurality of modulation systems

. . Superposing

AH31

. Characterized by code types

AK00
USING NON-LINEAR OPTICAL EFFECTS OTHER THAN NOISE SUPPRESSION

AK01

AK02

AK03

AK04

AK05

AK06

. Optical Kerr effects

. Light wave and photon mixing (e.g. FWM)

. Self-phase modulation (SPM)

. Cross phase modulation (XPM)

. Induced Raman scattering (SRS)

. Stimulated Brillouin scattering (SBS)

AL00
NETWORK FORMS

AL01

AL02

AL03

AL04

AL05

AL06

AL07

AL08

AL10

. Bus types

. Loop (ring) types

. . Double loops

. . N-multiple loops

. . Transmitting in both directions using one loop

. . Transmitting in one direction using one loop

. Star types

. . Passive double stars (PDS, PON)

. Mesh types

AL11

AL12

AL13

AL14

AL15

AL16

AL18

. Bidirectional transmission

. . Transmission paths being common for up and down transmission

. . Transmission paths being different for up and down transmission

. . Half-duplex communication

. . Full-duplex communication

. Providing no light sources at substations

. Parallel transmission paths

AL21

AL22

AL23

AL24

AL25

AL26

AL27

AL28

. Optical space transmission

. . Transmission path forms

. . . Line-of-sight communication

. . . Beyond-the-horizon communication

. . . . Reflection types

. . . . Relaying types

. . . Combinations thereof

. . One or both of optical terminals moving

AM00
COMMUNICATION PROTOCOL CONTROLS

AM01

AM02

AM03

AM04

AM05

AM06

AM07

AM08

AM09

AM10

. Protocol control execution timing

. . Communication start time

. . Always under communication

. . Communication end time

. . Emergencies

. Control contents

. . Communication rates

. . Wavelength allocation controls

. . Address setting

. . Selection of communication modes or communication systems

AN00
POWER SUPPLIES

AN01

AN02

AN03

AN05

. Power supplies to devices or circuits in local equipment

. Power supplies to devices or circuits in other than local equipment

. Power supplies by light

. Controls of power supply circuits

KA00
TECHNOLOGY ON SUPPRESSION OF SIGNAL DETERIORATION INCLUDING NOISE AND DISTORTION

KA01

KA02

KA03

KA04

KA05

KA06

KA07

KA08

KA09

KA10

. Types or causes of signal deterioration (including noise and distortion)

. . Wavelength dispersion or group delays

. . . Secondary dispersion

. . . Tertiary or higher dispersion

. . Polarization mode dispersion (PMD)

. . Signal deterioration due to non-linear optical effects

. . . Light wave and photon mixing, e.g. FWM

. . . Self-phase modulation (SPM)

. . . Cross phase modulation (XPM)

. . . Induced Brillouin scattering (SBS)

KA12

KA13

KA14

KA15

KA16

KA17

KA18

KA19

KA20

. . Other than wavelength dispersion or group delays

. . . Fluorescent lamps, sunshine, natural light

. . . Excitation light per se of optical fiber amplifiers

. . . Amplified spontaneous emission light (ASE)

. . . Reflection noise of optical signals (wire transmission paths)

. . . Reflection noise of optical signals (wireless, space transmission paths)

. . . Optical beat noise

. . . Modulation distortion

. . . Phase noise, jitter

KA23

KA24

KA25

KA28

. . . Clipping

. . . Harmonic distortion

. . . Dark currents, shot noise

. Characterized by detection of signal deterioration, noise, or distortion.

KA31

KA32

KA33

KA34

KA35

KA36

KA39

KA40

. Suppression means of signal deterioration (including noise and distortion)

. . Fixed dispersion compensation

. . Variable dispersion compensation

. . Transmission path dispersion management

. . Spectrum expansion, or reduction of power density

. . Pre-chirp methods

. . By electric means

. . . Generating cancel and distortion suppression signals

KA42

KA43

KA44

KA45

. . By optical means

. . . Using light absorption

. . . Performing suppression of noise by optical level controls

. . . Wavelength interval controls

LA00
MONITORING, FAULT DETECTION, RESTORATION, OR NOTIFICATION

LA01

LA02

LA03

LA04

LA05

LA06

LA07

LA08

. Communication components to be monitoring objects

. . Whole optical fiber communication systems

. . Whole optical space communication systems

. . Transmitters

. . Receivers

. . Transmission paths

. . Repeaters

. . Nodes, OXC, OADM

LA11

LA12

LA13

LA14

LA15

LA16

LA17

LA18

. Monitoring or fault items

. . Aging deterioration

. . Loss due to transmission

. . Specifying contents of faults or troubles

. . Searching for trouble or fault positions

. . Monitoring of extra constructions

. . Connection status of connectors

. . Transmission ranges

LA21

LA22

LA23

LA24

LA26

. Using supervisory signals

. . Signals for detecting faults or troubles

. . Signals for notifying the results of trouble detection

. . Transmitting to other devices

. Performing detection, restoration, or notification without supervisory signals

LA31

LA32

LA33

LA35

LA38

. Characterized by forms of supervisory signals

. . Superposing on main signals

. . Using wavelengths different from main signals

. Performing centralized monitoring by monitoring stations, or monitoring devices

. Determination methods for troubles, or abnormalities

LA41

LA42

LA43

LA44

LA45

LA46

LA47

. Special constructions for monitoring, trouble detection, restoration, or notification

. . Loop back

. . Bypass

. . In-use and extra

. . . Optical devices

. . . Transmission paths

. . . Function units or communication systems

LA51

LA52

LA53

LA54

LA56

. Characterized by monitoring time

. . Performing monitoring in-service

. . Performing monitoring out of service

. . Performing monitoring at system (re)start-up time

. . Intermittent monitoring, Cyclic monitoring

MA00
THIS PLACE COVERS THE SUBJECT MATTER FOR TRANSMISSION ELEMENTS HAVING CONTROLLED OBJECTS.

MA01

MA02

MA03

MA04

MA05

. Optical transmitters

. Optical receivers

. Optical repeaters

. OADM

. OXC

MB00
CONTROL OBJECTS

MB01

MB02

MB03

MB04

MB05

MB06

MB07

MB08

MB09

MB10

. Optical devices to be control objects

. . Transmitting light sources and the drive circuits

. . Local oscillation light sources and the drive circuits

. . Optical modulators and the drive circuits

. . Optical amplifiers and the drive circuits

. . . Optical fiber type amplifiers (Excitation light sources)

. . . Semiconductor type amplifiers

. . Light receiving elements and the drive circuits

. . Optical attenuators and the drive circuits

. . Optical filters

MB11

MB12

MB13

MB14

MB15

MB16

MB17

MB18

MB20

. . Optical switches

. . Optical delay elements, or optical phase shifters

. Electric circuit parts to be control objects

. . Discrimination circuits

. . Comparison circuits

. . Oscillation circuits, or synchronization (clock) circuits

. . Amplification circuits

. . Delay circuits

. Mechanical controls (Using actuators)

MC00
PHYSICAL CHARACTERISTICS TO BE CONTROL OBJECTS

MC01

MC02

MC03

MC04

MC05

MC06

MC07

. Wavelengths of light sources, optical filters, or the like

. . Stabilization

. . Wavelength variable controls (Controls to a desired wavelength)

. . Controls by temperatures

. . Controls by currents

. Amount of optical delays

. Polarization of light, or polarization of waves

MC11

MC12

MC13

MC14

MC15

MC16

MC17

MC18

. Optical signal levels

. . Output constant control APC (ALC)

. . Amplification factor constant control AGC

. . Considering wavelength multiplex number

. . Gain equalization, or level equalization (Flattening)

. . . Characteristics fixed

. . . Characteristics variable

. . . Gain equalization by considering transmission ranges

MC21

MC22

MC23

MC24

MC25

MC26

MC28

MC29

MC30

. Electric frequencies

. . Stabilization

. Electric signal levels

. . Output constant control APC (ALC)

. . Amplification factor constant control AGC

. Electric delay quantity (Phases)

. Modulation factors (including both optical and electrical)

. For pulses (e.g. positions, width)

. Varying standard values, reference values, or thresholds

MD00
CONTROL FORMS

MD01

MD02

MD03

MD04

MD06

MD07

. Feedback

. Feed forward

. Control loops being performed in local equipment only

. Other devices being included in control loops

. Wavelength batch controls

. Wavelength individual controls

MH00
MONITOR SIGNALS

MH01

MH02

MH03

MH04

MH05

MH06

MH07

. Transmission elements extracting monitor signals

. . Optical transmitters

. . Optical receivers

. . Optical repeaters

. . OADM

. . OXC

. . Transmission paths

MH11

MH12

MH13

MH14

MH15

MH16

MH17

MH18

MH19

MH20

. Monitor objects

. . Optical signals or electrical signals

. . . Transmission signals

. . . Received signals

. . Reflected light, or return light

. . Noise components

. . S/N

. . Excitation light

. . Reference signals

. . . Pilot signals, or sine-wave signals

MH21

MH22

MH23

MH24

MH25

MH26

MH27

MH28

MH29

MH30

. Monitor physical quantity

. . Intensity (Voltage)

. . Currents

. . Wavelengths

. . Electric frequencies

. . Temperatures

. . Delay quantity (Phases)

. . Peak values, maximum values, or minimum values

. . Mean values

. . Mark rates

MH32

. . BER, eye openings, or specific bit patterns

NA00
OPTICAL CROSS-CONNECTIONS, OR OPTICAL ROUTING

NA01

NA02

NA03

NA04

NA05

NA06

NA07

NA08

. Route controls

. . Route controls by electric control signals.

. . Performing route controls by optical control signals

. . Switching accompanied by wavelength conversion

. . Wavelength fixed assignment

. . Wavelength variable assignment

. . Signals per se having route information

. . Supplied with route control signals from outside

PA00
OPTICAL FIBERS

PA01

PA02

PA03

PA04

PA05

PA06

PA07

PA08

PA09

. Glass type optical fibers

. . Dispersion shift (zero dispersion) fibers

. . Positive dispersion fibers

. . Negative dispersion fibers

. . Positive dispersion slope fibers

. . Negative dispersion slope fibers

. . Dispersion flat fibers

. . Expansion of effective cross sectional areas (High dispersion slope fibers)

. . Low dispersion slope fibers

PA11

PA12

PA14

PA16

. . Multi-mode fibers

. . Polarization maintaining fibers

. Plastic optical fibers

. Using plural kinds of fibers with different characteristics

PB00
LIGHT SOURCES

PB01

PB02

PB03

PB04

PB05

PB06

. Names or structure of light sources

. . LED

. . Distribution feedback type (DFB) semiconductor lasers

. . Distribution reflection type (DFR) semiconductor lasers

. . Fabry-Perot type lasers

. . Ring resonator type lasers

PB11

PB12

PB13

PB14

PB15

PB16

PB17

PB18

PB19

PB20

. Functions or characteristics of light sources

. . Characterized in wavelength fixed

. . Wavelength variable

. . Plane light emission types

. . Multiwavelength oscillation light sources

. . Broadband types

. . Multimode (Longitudinal mode) oscillation

. . Array structures

. . Mode lock

. . Short pulse light sources

PC00
OPTICAL FILTERS

PC01

PC02

PC03

PC04

PC05

PC06

PC07

. Names or structures of optical filters

. . Diffraction gratings

. . . Fiber gratings

. . Fabry-Perot types, or ring resonator types

. . Dielectric multilayer types

. . Mach-Zehnder types

. . Acoustooptic filters (AOTF)

PC11

PC12

PC13

PC14

PC15

PC16

PC17

PC18

. Functions or characteristics of optical filters

. . Band pass types (BPF)

. . Band elimination types (BEF)

. . High-pass filters (HPF)

. . Low-pass filters (LPF)

. . Characteristics variable

. . Characterized by characteristics fixed

. . Recursive filters

PD00
OPTICAL SWITCHES

PD01

PD02

PD03

PD04

PD05

. Optical switch principles, or optical switch structures

. . Phase shift types

. . Frequency shift types

. . Gain absorption types

. . Mechanical switching types

PD11

PD12

PD13

PD14

PD15

PD16

PD17

. Number of input and output of optical switches

. . 1x1 switches

. . 1x2, or 2x1 switches

. . 1xN, or Nx1 switches

. . 2x2 switches

. . NxN switches

. . NxM switches

PH00
OTHER OPTICAL DEVICES

PH01

PH02

PH03

. Optical modulators

. . Mach-Zehnder types

. . Electric field light absorption type (EA) modulators

PH11

PH12

PH13

PH14

PH15

. Optical (direct) amplifiers

. . Optical fiber types

. . . Rare earth metal dope types

. . . Raman amplifiers

. . Semiconductor types

PH21

PH22

PH23

PH24

PH25

PH26

. Polarization elements

. . Polarization coupling and separation, or polarization beam splitters

. . Polarizers, or optical analyzers

. . Half-wavelength (lambda/2) plates

. . One-quarter wavelength (lambda/4) plates

. . Polarization scramblers

PH31

PH32

PH33

PH34

PH35

PH36

PH37

PH38

. Light receiving parts

. . PIN-PD

. . Avalanche types

. . Phototransistors

. . Solar cells

. . Multiple division type light receiving elements

. . Balance type (Dual type) light receiving elements

. . Array structures

PH41

PH42

PH43

PH44

PH45

PH46

PH47

PH48

PH49

PH50

. Optical circulators

. Optical attenuators

. Optical isolators

. Light emission and reception combination elements

. AWG

. Fiber gratings (PC03 takes precedence)

. Wave separating (with wave length dependency)

. Wave combining (with wavelength dependency)

. Wave separating (without wavelength dependency)

. Coupling (without wavelength dependency)

RB00
OPTICAL DEVICES OR CIRCUITS CHARACTERIZED BY SIGNAL PROCESSING

RB01

RB02

RB03

RB04

RB05

RB06

RB07

. Optical delays, optical shifts, devices, or circuits

. Optical reflecting devices, or circuits

. Characterized by using methods of optical filters

. Wavelength conversion circuits (NA04 or RB19 takes precedence)

. Optical clock regeneration devices, or circuits

. Optical storage means (Optical buffers, optical memories)

. Devices, or circuits using birefringence

RB11

RB12

RB14

RB15

RB16

RB17

RB18

RB19

. Optical cross-connections (OXC)

. ADD/DROP units (OADM)

. Optical multiplexing or demultiplexing units

. . Exclusively using for multiplexing

. . Exclusively using for demultiplexing

. . Multistage multiplexing or demultiplexing types

. . Batch multiplexing or demultiplexing

. . Accompanying wavelength conversion units

RC00
OPTICAL REGENERATIVE PROCESSING UNITS

RC01

RC02

RC03

RC04

. Electrical multiplexing

. Electrical demultiplexing

. Electrical exchanges

. Optical regenerative repeating

RD00
THIS PLACE COVERS THE SUBJECT MATTER CHARACTERIZED BY ELECTRIC CIRCUITS

RD01

RD02

RD03

RD04

RD05

RD06

. Discriminating circuits

. Comparison circuits

. Oscillation circuits

. Synchronization, or clock circuits

. Amplification circuits

. Differentiating circuits

RD11

RD12

RD13

RD14

RD15

. Filter circuits

. . Bandpass types

. . Bandstop types

. . High-pass filters

. . Low-pass filters including integration circuits

RD21

RD22

RD23

RD25

RD26

RD27

RD28

. Frequency conversion circuits

. . Division circuits

. . Multiplication circuits

. Serial-to-parallel conversion, or parallel-to-serial conversion

. AD/DA conversion

. Delay circuits, or phase shift circuits

. Storage means (Buffers, memories)

5K102	Optical communication system
	H04B10/00 -10/90;H04J14/00-14/08,130