Compact silicon photonics-based laser modules for FM-CW LIDAR and RFOG

Ayotte, S.; Costin, F.; Babin, A.; Paré-Olivier, G.; Girard-Deschenes, Emile; Morin, Michel; Filion, B.; Bédard, K.; Chrétien, Philippe; Bilodeau, Ghislain; Perron, Louis-Philippe; Davidson, Charles-Andre; D'Amato, D.; Laplante, Mathieu; Desbiens, A.; Bastien, Simon; Boudreau, Stéphane; Rousseau, Guy; Blanchet-Létourneau, J.

doi:10.1117/12.2546449

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…The high-level schematic of the multi-frequency laser source (MFLS) is shown in Figure 1 and consists of all the optical components before the two optical circulators (see [13] for detailed architecture including SiP chip). The optical power at 1550 nm is provided by three distributed feedback (DFB) semiconductor lasers, a master laser and two slave lasers, developed by TeraXion in collaboration with the National Research Council of Canada (NRC).…”

Section: Multi-frequency Laser Source 21 Architecturementioning

confidence: 99%

“…We present progress towards compact RFOGs using phase locked diode lasers and miniaturized optics on a silicon optical bench (SiOB). Further integration was realized by encapsulating unpackaged semiconductor lasers on a common substrate with a silicon photonics (SiP) chip comprising active and passive components [11]- [13]. Other than a reduction in size, this allowed a sizable increase in the bandwidth of the OPLL loops by shortening optical and electrical paths.…”

Section: Introductionmentioning

confidence: 99%

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Multi-frequency low-noise semiconductor laser sources enabling advancement of resonant fiber optic gyroscopes including performance over temperature

Girard-Deschênes,

Costin,

Ayotte

et al. 2024

Photonic Instrumentation Engineering XI

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We present multi-frequency low-noise semiconductor laser sources for resonant fiber optic gyroscope (RFOG) interrogation that have enabled excellent gyro stability over temperature. Each laser source includes three distributed feedback semiconductor laser chips coupled with micro-lenses to multi-component silicon photonics (SiP) chips. A first laser, the master, is locked to the RFOG with a Pound-Drever-Hall loop. Two slave lasers are optically phase-locked to the master laser with electrical loop bandwidths of 100 MHz. The SiP chips perform beat note detection and several other functions, such as phase and intensity noise suppression. The lasers and SiP chips are packaged in an optical engine that is controlled by compact low noise electronics. The fiber pigtails are connected to the RFOG so that light is sent in clockwise and counterclockwise directions. Tracking of the RFOG resonance frequencies in both directions allows rotation sensing. An ultra-stable differential frequency noise floor of 0.05 Hz/rt-Hz was obtained between the lasers and the coil resonator which was instrumental in achieving results for the RFOG over 60˚ C operating temperature range. The corresponding angle random walk level is less than 0.01 ˚/rt-hr and was not limited by laser differential frequency noise. The gyroscope bias drift over the tested temperature range was maintained within 0.005 ˚/hr, the best-ever published RFOG performance over temperature to date.

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Section: Multi-frequency Laser Source 21 Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-frequency low-noise semiconductor laser sources enabling advancement of resonant fiber optic gyroscopes including performance over temperature

Girard-Deschênes,

Costin,

Ayotte

et al. 2024

Photonic Instrumentation Engineering XI

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show abstract

“…A small laser or other optical components are linked to the chip to create a complete system that is then connected to an electrical pin and soldered to a PCB [ 53 , 54 , 55 ]. This kind is different from the packaging for the numerous application cases outlined in the preceding section [ 56 ]. Figure 13 depicts an integrated package form of a femtosecond laser [ 57 ], with a silicon photonic chip on the left connected to 12 multicore fibers through 84 connecting channels in the center, while glass serves as the intermediary layer.…”

Section: Application Of Sip Technologymentioning

confidence: 99%

A Review of System-in-Package Technologies: Application and Reliability of Advanced Packaging

Wang

Yang

et al. 2023

Micromachines

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The system-in-package (SiP) has gained much interest in the current rapid development of integrated circuits (ICs) due to its advantages of integration, shrinking, and high density. This review examined the SiP as its focus, provides a list of the most-recent SiP innovations based on market needs, and discusses how the SiP is used in various fields. Reliability issues must be resolved if the SiP is to operate normally. Three factors—thermal management, mechanical stress and electrical properties—can be paired with specific examples in order to detect and improve package reliability. This review provides a thorough overview of SiP technology, serves as a guide and foundation for the SiP in package reliability design, and addresses the challenges and potential for further development of this kind of package.

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“…Within the Broadcom portfolio, for example, are integrated solutions covering up to 80% of the needed components including emitters, sensors, encoders, high speed optical data links, Ethernet physical layers (PHYs), and Micro Optics (Figure 1). The emerging silicon photonics technologies also offer a path toward miniaturization, which could be exploited to incorporate LIDAR systems into even more portable applications [6]. Current 3D mapping system based on structured light illumination already rely on DOEs as precision pattern generators that are used for accurate 3D depth determination.…”

Section: Introductionmentioning

confidence: 99%

Diffractive optical elements as optical calibration references for LIDAR systems

Batoni

Stack

Gardner

et al. 2023

Autonomous Systems: Sensors, Processing and Security for Ground, Air, Sea, and Space Vehicles and Infrastructure 2023

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As autonomous vehicles rapidly transition to fully automated operations, the ability of these systems to make critical safety decisions in real-time remains of paramount concern. Successful implementation will rely on maintaining the highest possible fidelity of the underlying image data while operating in the challenging automotive light detection and ranging (LIDAR) environment. In addition to three dimensional (3D) depth data, some proposed systems seek to overlay data from multiple sources in order to further improve decision quality and safety margin. The requirement to establish and maintain system calibration over life, including overlay of various fields of view suggests the need for an optical reference that could be used to routinely recalibrate the system in the field. The ability to validate and re-calibrate LIDAR systems in the field without the need for operator intervention would also serve to ensure consistent data quality as well as removing the need to take vehicles offline for periodic re-calibration. Diffractive-Optical-Elements (DOEs) are well suited for use as optical calibration references. In addition to their small size and lithographic precision, fused silica DOEs exhibit extreme stability and mechanical strength, potentially allowing for direct integration into the LIDAR system itself. In this paper, we examine the use of DOEs as LIDAR calibration standards, including the impact of material properties on the stability of the generated reference patterns and consequently on the reliability of the imaging system data.

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Compact silicon photonics-based laser modules for FM-CW LIDAR and RFOG

Cited by 3 publications

References 5 publications

Multi-frequency low-noise semiconductor laser sources enabling advancement of resonant fiber optic gyroscopes including performance over temperature

Multi-frequency low-noise semiconductor laser sources enabling advancement of resonant fiber optic gyroscopes including performance over temperature

A Review of System-in-Package Technologies: Application and Reliability of Advanced Packaging

Diffractive optical elements as optical calibration references for LIDAR systems

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