Abstract: A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) optical feedback of the first laser transmitter, and (ii) optical feedback of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving optical signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.

Abstract: A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) optical feedback of the first laser transmitter, and (ii) optical feedback of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving optical signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.

Abstract: A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) optical feedback of the first laser transmitter, and (ii) optical feedback of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving optical signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.

Abstract: An optical modulator consists of an electrical input for receiving an electrical control signal, an optical output for outputting an optical signal, and at least two optical cavities coupled together according to a set of coupling parameters. The electrical control signal frequency is in a narrow frequency band, and the coupling parameters are selected to match the modulator frequency band of operation.

Abstract: An optical modulator for modulating light with an electrical signal, the modulator comprising: an optical cavity, for enhancing an optical field of said light in a first mode, an electrical input for receiving an electrical signal, a transformer associated with said cavity and with said electrical input for transforming light within said optical field into a second mode substantially orthogonal to said first mode, in accordance with said electrical signal, and an selective output coupler associated with said optical cavity, to couple said second mode to an output, thereby to provide, at said output, light modulated in accordance with said electrical signal. Also disclosed is an internally modulated laser.

Abstract: An optical modulator consists of an electrical input for receiving an electrical control signal, an optical output for outputting an optical signal, and at least two optical cavities coupled together according to a set of coupling parameters. The electrical control signal frequency is in a narrow frequency band, and the coupling parameters are selected to match the modulator frequency band of operation.