An apparatus comprises a photonic oscillator circuit configured to generate optical signals that are separated by a uniform delay; radio frequency (RF) generating circuitry configured to receive the optical signals and produce a series of reference clock signals having a same clock signal frequency, wherein each reference clock signal in the series includes a uniform delay from a previous clock signal in the series; and a plurality of analog-to-digital converter (ADC) circuits, wherein an ADC circuit includes a signal input to directly receive an RF input signal that is continuous in time and amplitude, and a clock input to receive a reference clock signal of the repeating series of reference clock signals, wherein the ADC circuits are configured to sample a RF input signal at the frequency of the reference clock signal with the uniform delay to sample interleaved digital values representing the RF signal.

An apparatus comprises a photonic oscillator circuit configured to generate optical signals that are separated by a uniform delay; radio frequency (RF) generating circuitry configured to receive the optical signals and produce a series of reference clock signals having a same clock signal frequency, wherein each reference clock signal in the series includes a uniform delay from a previous clock signal in the series; and a plurality of analog-to-digital converter (ADC) circuits, wherein an ADC circuit includes a signal input to directly receive an RF input signal that is continuous in time and amplitude, and a clock input to receive a reference clock signal of the repeating series of reference clock signals, wherein the ADC circuits are configured to sample a RF input signal at the frequency of the reference clock signal with the uniform delay to sample interleaved digital values representing the RF signal.

To provide a light source device for a fiber optic gyroscope capable of broadening the bandwidth of the laser light and improving stability of a scale factor. A light source device for a fiber optic gyroscope configured to drive a fiber optic gyroscope includes: a laser light source 10, a stabilizing part 20, and a bandwidth broadening part 30. The laser light source 10 emits a laser light of a predetermined frequency. The stabilizing part 20 stabilizes the predetermined frequency of the laser light emitted from the laser light source 10. The bandwidth broadening part 30 makes the laser light stabilized by the stabilizing part 20 into a light having a continuous broadband spectrum.

One embodiment is directed towards a stabilized laser including a laser to produce light at a frequency and a resonator coupled to the laser such that the light from the laser circulates therethrough. The laser also includes Pound-Drever-Hall (PDH) feedback electronics configured to adjust the frequency of the light from the laser to reduce phase noise in response to light sensed at the reflection port of the resonator and transmission port feedback electronics configured to adjust the frequency of the light from the laser toward resonance of the resonator at the transmission port in response to the light sensed at the transmission port of the resonator, wherein the transmission port feedback electronics adjust the frequency at a rate at least ten times slower than the PDH feedback electronics.

A diode laser system employing a vapor cell in an external cavity and related techniques are disclosed. The system may be configured to provide high-power, multi-mode output within one or more narrow ranges of wavelengths. A beam emitted from the laser along an initial optical axis passes through a vapor cell, where the effective ground-state occupation density of the vapor is reduced, causing spatial gradients of the vapor's effective index of refraction. Refraction of rays passing through these gradients produces angular deflections, most significantly for rays where the gradients are strongest and for wavelengths whose index of refraction departs furthest from unity near these atomic transitions. An at least partially reflective surface which is not aligned with the initial optical axis but rather is aligned perpendicular to some of these deflected rays provides feedback within an angular range, thereby contributing to the gain of the laser source for these wavelengths.

Embodiments herein describe various arrangements of an optical bench used to perform spectroscopy. For example, a spectroscopy system may include a pump optical signal and a probe optical signal that are transmitted through a vapor cell on the optical bench. The optical bench can further include one or more optical components (e.g., beam splitter and a thin film polarizer) for redirecting a portion of the probe and pump optical signals to photodiodes. In one embodiment, the measurements obtained from the photodiodes can be used to perform multiple tasks. For example, the measurements can be used to adjust the power of the optical signals in the optical bench (e.g., make DC power adjustments), perform amplitude modulation correction, and lock a laser frequency to a peak of an absorption spectrum of the vapor in the vapor cell.

A diode laser system employing a vapor cell in an external cavity and related techniques are disclosed. The system may be configured to provide high-power, multi-mode output within one or more narrow ranges of wavelengths. A beam emitted from the laser along an initial optical axis passes through a vapor cell, where the effective ground-state occupation density of the vapor is reduced, causing spatial gradients of the vapor's effective index of refraction. Refraction of rays passing through these gradients produces angular deflections, most significantly for rays where the gradients are strongest and for wavelengths whose index of refraction departs furthest from unity near these atomic transitions. An at least partially reflective surface which is not aligned with the initial optical axis but rather is aligned perpendicular to some of these deflected rays provides feedback within an angular range, thereby contributing to the gain of the laser source for these wavelengths.

In some embodiments, a system includes a laser that generates an optical signal and a resonator that receives the optical signal. The resonator includes an optical resonator cavity comprising a first and second end, wherein the optical signal propagates at a resonant frequency; a first optical anti-resonator terminating the first end and having a first stopband; and a second optical anti-resonator terminating the second end and having a second stopband. The system includes a detector that generates an electrical signal from a modified resonator output of the resonator; and Pound-Drever-Hall servo circuitry configured to generate control signals for controlling a frequency of the optical signal generated by the laser or phase modulation devices attached to the optical resonator cavity or the first or second optical anti-resonator, wherein each phase modulation changes a length of at least one of the optical resonator cavity or the first or second optical anti-resonator.

A control system for frequency control of a laser module, comprising at least one laser module for generating laser radiation, at least one control device coupled or configured to couple to the laser module, and at least one optical resonator coupled or configured to couple to the control device, wherein the control device comprises a semiconductor substrate, a first Pound-Drever-Hall system arranged on the semiconductor substrate and at least one second Pound-Drever-Hall system arranged on the semiconductor substrate, wherein the laser module is coupled to the first Pound-Drever-Hall system of the control device and is configured to couple to the at least second Pound-Drever-Hall system of the control device, wherein the first Pound-Drever-Hall system is coupled to the optical resonator and wherein the second Pound-Drever-Hall system is configured to couple to the optical resonator, and wherein the number of Pound-Drever-Hall systems is greater than the number of laser modules or optical resonators.