Laser transmitter capable of transmitting line data and supervisory information at a plurality of data rates
First Claim
Patent Images
1. An optical transmitter, transponder or transceiver for sending supervisory data signals and line data signals as a composite optical signal through an optical fiber link comprising:
- a) means for receiving an electrical line data signal having a line data bit rate;
b) means for receiving an electrical supervisory data signal;
c) means for converting the received electrical supervisory data signal into an electrical modulated supervisory data signal having one or more predetermined supervisory carrier frequencies and a supervisory carrier frequency amplitude;
d) a driver for driving the received line data signals to a laser module e) a laser module coupled to a driver for sending as a single combined signal, a transmit signal comprising the line data signal and the converted supervisory data signal having a modulation index that is the ratio of an optical power associated with the supervisory data signals to an optical power associated with the line data signals;
f) circuitry for receiving incoming line data bit rate information; and
, g) control circuitry for controlling the modulation index by varying the supervisory carrier frequency amplitude in dependence upon the line data bit rate.
7 Assignments
0 Petitions
Accused Products
Abstract
An optical transmitter for sending supervisory data signals and line data signals as a composite optical signal through an optical fiber link is disclosed. The transmitter may take the form of a transmitter, transceiver or transponder and includes circuitry for receiving incoming line data bit rate information for varying and or controlling the modulation index by varying the supervisory carrier frequency amplitude in dependence upon the line data bit rate.
31 Citations
19 Claims
-
1. An optical transmitter, transponder or transceiver for sending supervisory data signals and line data signals as a composite optical signal through an optical fiber link comprising:
-
a) means for receiving an electrical line data signal having a line data bit rate;
b) means for receiving an electrical supervisory data signal;
c) means for converting the received electrical supervisory data signal into an electrical modulated supervisory data signal having one or more predetermined supervisory carrier frequencies and a supervisory carrier frequency amplitude;
d) a driver for driving the received line data signals to a laser module e) a laser module coupled to a driver for sending as a single combined signal, a transmit signal comprising the line data signal and the converted supervisory data signal having a modulation index that is the ratio of an optical power associated with the supervisory data signals to an optical power associated with the line data signals;
f) circuitry for receiving incoming line data bit rate information; and
,g) control circuitry for controlling the modulation index by varying the supervisory carrier frequency amplitude in dependence upon the line data bit rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17, 18, 19)
-
-
11. A method for transmitting data in optical transmitter or transponder comprising the steps of:
-
a) receiving an electrical line data signal having a line data bit rate;
b) receiving an electrical supervisory data signal;
c) converting the received supervisory data signal into an electrical supervisory data signal having one or more predetermined supervisory carrier frequencies and a supervisory carrier frequency amplitude;
d) driving the received line data signals;
e) sending as a single combined signal, a transmit signal comprising the line data signal and the converted supervisory data signal having a modulation index that is the ratio of an optical power associated with the supervisory data signals to an optical power associated with the line data signals;
f) receiving incoming line data bit rate information; and
,g) controlling the modulation index by varying the supervisory carrier frequency amplitude in dependence upon the line data bit rate. - View Dependent Claims (12, 13, 14, 15)
-
-
16. An optical, transmitter for sending supervisory data signals and line data signals as a composite signal over an optical fiber link, comprising:
-
a) means for receiving an electrical line data signal having a line data bit rate;
b) means for receiving an electrical supervisory data signal;
c) a laser for transmitting a single transmit signal comprising the line data signal and the supervisory data signal having a modulation index that is the ratio of an optical power associated with the supervisory data signals to an optical power associated with the line data signals;
d) control circuitry for controlling the modulation index by varying a carrier frequency amplitude of the supervisory data signal in dependence upon the line data bit rate.
-
Specification