| Class Number |
Class Name |
No. of Patents |
| 398/9 |
Diagnostic testing |
831 |
| 398/25 |
Determination of communication parameter |
240 |
| 398/37 |
Amplifier or repeater operation |
203 |
| 398/27 |
Bit error rate |
144 |
| 398/36 |
Collision detection |
21 |
| 398/28 |
Fiber characteristic |
67 |
| 398/29 |
Dispersion |
78 |
| 398/38 |
Power |
173 |
| 398/26 |
Signal to noise ratio |
121 |
| 398/35 |
Tdm system |
21 |
| 398/30 |
Using supervisory signal |
148 |
| 398/31 |
Different wavelengths for diagnostic and communication |
139 |
| 398/33 |
Monitoring |
295 |
| 398/32 |
Pilot signal |
141 |
| 398/34 |
Wdm system |
164 |
| 398/17 |
Fault detection |
156 |
| 398/20 |
Optical fiber |
109 |
| 398/21 |
Determined by reflection from break in fiber |
37 |
| 398/24 |
Receiver |
48 |
| 398/18 |
Repeater |
58 |
| 398/19 |
Switch |
87 |
| 398/22 |
Transceiver |
61 |
| 398/23 |
Transmitter |
56 |
| 398/10 |
Fault location |
83 |
| 398/13 |
Fiber or waveguide |
80 |
| 398/11 |
Repeater |
42 |
| 398/15 |
Stop transmission or reduce power |
96 |
| 398/12 |
Switch |
67 |
| 398/14 |
Wdm |
66 |
| 398/16 |
Test signal |
103 |
| 398/41 |
Duplex |
114 |
| 398/42 |
Wavelength division |
141 |
| 398/40 |
Eavesdropping |
50 |
| 398/1 |
Fault recovery |
859 |
| 398/2 |
Bypass inoperative element |
99 |
| 398/3 |
In a ring or loop |
122 |
| 398/4 |
Using a secondary ring or loop |
111 |
| 398/5 |
Spare channel or standby optical fiber |
262 |
| 398/6 |
In a repeater system |
24 |
| 398/8 |
Tdm |
12 |
| 398/7 |
Wdm |
104 |
| 398/115 |
Hybrid communication system (e.g., optical and rf) |
346 |
| 398/116 |
Including specific optical interface |
98 |
| 398/117 |
Housing or mounting |
58 |
| 398/39 |
Interference signal transmission or elimination (e.g., jamming or antijamming) |
35 |
| 398/43 |
Multiplex |
231 |
| 398/66 |
Broadcast and distribution system |
233 |
| 398/67 |
Bidirectional |
179 |
| 398/68 |
Wdm |
171 |
| 398/73 |
Bus |
25 |
| 398/70 |
Hub or central office |
150 |
| 398/71 |
Including subscribers |
197 |
| 398/72 |
Bidirectional |
230 |
| 398/69 |
With variable frequency channel assignment |
68 |
| 398/77 |
Code division multiplexing |
47 |
| 398/78 |
Multiple access (e.g., cdma) |
65 |
| 398/74 |
Hybrid |
73 |
| 398/75 |
Time and wavelength division |
169 |
| 398/44 |
Mode |
18 |
| 398/58 |
Optical local area network (lan) |
270 |
| 398/61 |
Active star |
69 |
| 398/62 |
Repeater |
24 |
| 398/60 |
Bus |
84 |
| 398/63 |
Passive star |
136 |
| 398/64 |
Repeater |
17 |
| 398/59 |
Ring or loop |
319 |
| 398/45 |
Optical switching |
444 |
| 398/46 |
Hybrid |
69 |
| 398/47 |
Time and wavelength |
114 |
| 398/55 |
Space |
129 |
| 398/56 |
Crossconnect |
157 |
| 398/57 |
Path finding or path routing |
121 |
| 398/52 |
Time |
96 |
| 398/53 |
Including delay |
102 |
| 398/54 |
Including photonic packet switching |
196 |
| 398/48 |
Wavelength |
297 |
| 398/50 |
Crossconnect |
219 |
| 398/51 |
Including photonic packet switching |
212 |
| 398/49 |
Router |
210 |
| 398/65 |
Polarization |
152 |
| 398/76 |
Subcarrier multiplexing |
125 |
| 398/98 |
Time division |
250 |
| 398/101 |
By specific optical element |
68 |
| 398/102 |
Including delay |
158 |
| 398/99 |
Multiple access (e.g., tdma, csma) |
114 |
| 398/100 |
Subscriber system |
138 |
| 398/103 |
Through free space |
27 |
| 398/79 |
Wavelength division or frequency division (e.g., raman, brillouin, etc.) |
908 |
| 398/82 |
By optical coupling |
565 |
| 398/83 |
Add or drop |
380 |
| 398/85 |
Filter |
226 |
| 398/84 |
Grating |
212 |
| 398/87 |
Grating |
379 |
| 398/88 |
Lens |
94 |
| 398/86 |
Prism |
62 |
| 398/91 |
Different sources |
289 |
| 398/92 |
Including pumping |
167 |
| 398/81 |
Dispersion compensation |
370 |
| 398/90 |
Electrically controlled single source |
40 |
| 398/93 |
Including feedback |
53 |
| 398/94 |
Power control |
148 |
| 398/95 |
Wavelength control |
128 |
| 398/89 |
Multiple access (e.g., wdma) |
20 |
| 398/97 |
Repeater |
130 |
| 398/80 |
Soliton |
26 |
| 398/96 |
Through free space |
34 |
| 398/118 |
Optical communication over freee space |
234 |
| 398/119 |
Compensation |
110 |
| 398/120 |
Power control |
44 |
| 398/127 |
In an office environment |
96 |
| 398/121 |
Satellite system |
94 |
| 398/122 |
Including alignment |
90 |
| 398/123 |
Feedback control |
46 |
| 398/125 |
Space to ground or ground to space |
64 |
| 398/124 |
Space to space |
61 |
| 398/126 |
Specific repeater |
69 |
| 398/128 |
Transceivers |
178 |
| 398/129 |
Including alignment |
215 |
| 398/130 |
Transmitter and receiver |
176 |
| 398/131 |
Including alignment |
198 |
| 398/173 |
Optical repeater system |
110 |
| 398/174 |
Demodulating |
12 |
| 398/177 |
Monitoring |
239 |
| 398/175 |
Regenerative |
161 |
| 398/176 |
Modulation conversion |
57 |
| 398/180 |
Specific optical elements |
165 |
| 398/178 |
Specific optical waveguide |
110 |
| 398/179 |
Soliton |
30 |
| 398/181 |
Supervisory signal by repeater |
131 |
| 398/135 |
Optical transceiver |
432 |
| 398/136 |
Including compensation |
208 |
| 398/137 |
Including feedback |
98 |
| 398/139 |
Including optical fiber or waveguide |
327 |
| 398/138 |
Single device as transmitter and receiver |
176 |
| 398/132 |
Photophone |
22 |
| 398/133 |
Specific transducer |
22 |
| 398/134 |
Including optical fiber or waveguide |
32 |
| 398/202 |
Receiver |
557 |
| 398/204 |
Heterodyne |
182 |
| 398/205 |
Including polarization |
121 |
| 398/206 |
Having feedback |
41 |
| 398/207 |
Specific optical elements |
57 |
| 398/203 |
Homodyne |
60 |
| 398/212 |
Including optical element (e.g., lens, mirror, etc.) |
208 |
| 398/213 |
Having feedback |
96 |
| 398/214 |
Including optical waveguide |
160 |
| 398/208 |
Including postcompensation |
242 |
| 398/210 |
Amplitude |
83 |
| 398/209 |
Feedback |
199 |
| 398/211 |
Intermodulation |
15 |
| 398/106 |
Remote control |
305 |
| 398/107 |
Bidirectional (i.e., monitoring or acknowledge) |
145 |
| 398/108 |
Interrogator system |
73 |
| 398/109 |
In industrial environment or hazardous environmrnt |
70 |
| 398/110 |
Through optical fiber or waveguide |
43 |
| 398/112 |
Plural |
103 |
| 398/114 |
Rotating part |
43 |
| 398/111 |
Switching |
73 |
| 398/113 |
Through optical fiber or waveguide |
77 |
| 398/140 |
Transmitter and receiver system |
252 |
| 398/156 |
Including alignment between transmitter and receiver |
96 |
| 398/158 |
Including compensation |
357 |
| 398/159 |
Reducing distortion or dispersion |
270 |
| 398/161 |
Using delay |
179 |
| 398/160 |
Using optical amplifier |
102 |
| 398/163 |
Including electrical oscillator |
84 |
| 398/162 |
Including feedback from receiver |
132 |
| 398/164 |
Including optical circuit board |
284 |
| 398/141 |
Including optical waveguide |
414 |
| 398/147 |
Dispersion compensation |
464 |
| 398/148 |
Using dispersion compensation optical fiber (e.g., dcof) |
152 |
| 398/149 |
Using equalizing filter (e.g., interferometer, grating) |
96 |
| 398/150 |
Using optical phase conjugation |
45 |
| 398/146 |
Soliton |
72 |
| 398/142 |
Specific type of fiber or waveguide |
70 |
| 398/144 |
Monomode |
70 |
| 398/143 |
Multimode |
45 |
| 398/145 |
Redundant fibers |
28 |
| 398/152 |
Including polarization |
285 |
| 398/157 |
Including pumping |
135 |
| 398/154 |
Including synchronization |
394 |
| 398/155 |
Clock recovery |
226 |
| 398/172 |
Including visible light modulation |
57 |
| 398/153 |
One transmitter, plural receivers |
42 |
| 398/168 |
Passive system |
138 |
| 398/169 |
Retroreflection |
55 |
| 398/165 |
Plural stations |
36 |
| 398/166 |
Address directing connections |
74 |
| 398/167.5 |
Central or master station |
93 |
| 398/167 |
Unidirectional or loopback |
31 |
| 398/151 |
Presence detection |
84 |
| 398/171 |
Received signal supplies power distribution to diverse devices |
43 |
| 398/170 |
Retroreflection |
79 |
| 398/182 |
Transmitter |
317 |
| 398/199 |
Chirping |
54 |
| 398/183 |
Having particular modulation |
435 |
| 398/187 |
Frequency modulation |
170 |
| 398/185 |
Hybrid modulation |
189 |
| 398/184 |
Including polarization |
114 |
| 398/186 |
Intensity modulation |
215 |
| 398/188 |
Phase modulation |
231 |
| 398/189 |
Pulse modulation |
169 |
| 398/191 |
Pulse time |
87 |
| 398/190 |
Pulse-code |
69 |
| 398/192 |
Including compensation |
243 |
| 398/194 |
For noise or distortion |
138 |
| 398/195 |
Including feedback |
186 |
| 398/198 |
For modulator control |
140 |
| 398/197 |
For power control |
200 |
| 398/196 |
For wavelength control |
128 |
| 398/193 |
Precompensation (e.g., prechirping, predistortion |
186 |
| 398/200 |
Including optical waveguide |
189 |
| 398/201 |
Including specific optical elements |
280 |
| 398/104 |
Underwater |
53 |
| 398/105 |
Cable repeater |
34 |
