Coherent Corp. develops, manufactures, and markets engineered materials, optoelectronic components and devices, and optical and laser systems and subsystems for the use in the industrial, communications, electronics, and instrumentation markets worldwide. It operates through three segments: Networking, Materials, and Lasers. The Networking segment offers telecommunication products for fiber-optic transmission; datacom transceivers, including pluggable transceivers for ethernet and fiber channel applications; and advanced optics, such as fiber and precision optics used in projection displays, crystal materials and components for optical communications, filters and assemblies for life sciences, sensors, instrumentation, and semiconductor equipment, as well as ultraviolet (UV), visible, and near-infrared spectroscopy optics for industrial lasers. The Materials segments provides laser optics and accessories; infrared thermal imaging optics and assemblies; polycrystalline materials; thermoelectric components, subassemblies, and systems; ceramic and metal-matrix composite products; semiconductor lasers and laser bars; Q-switched laser modules, uncooled pump laser modules, and laser systems for superhard materials processing; laser processing heads and beam delivery systems; EELs, VCSELs, and detectors; pumps for amplifiers; precision optical assemblies, infrared optics, thin-film coatings and optical materials; optical solutions; and integrated circuits for transceivers. The Lasers segment offers UV gas and solid-state lasers; UV optical systems, line beams, and mask-based imaging systems; UV nanosecond lasers; continuous-wave lasers and systems; amplifiers; subsystems and standard systems; IR lasers; crystals and diode lasers, and specialty polishing and coating solutions. The company was formerly known as II-VI Incorporated and changed its name to Coherent Corp. in September 2022. Coherent Corp. was incorporated in 1971 and is headquartered in Saxonburg, Pennsylvania.

Fabrinet provides optical packaging and precision optical, electro-mechanical, and electronic manufacturing services in North America, the Asia-Pacific, and Europe. The company offers a range of advanced optical and electro-mechanical capabilities in the manufacturing process, including process design and engineering, supply chain management, manufacturing, printed circuit board assembly, advanced packaging, integration, final assembly, and testing. Its products include switching products, including reconfigurable optical add-drop multiplexers, optical amplifiers, modulators, and other optical components and modules that enable network managers to route voice, video, and data communications traffic through fiber optic cables at various wavelengths, speeds, and over various distances. The company's products also comprise transceivers, tunable lasers, and transponders; and active optical cables, which provide high-speed interconnect capabilities for data centers and computing clusters, as well as Infiniband, Ethernet, fiber channel, and optical backplane connectivity. In addition, it provides solid state, diode-pumped, gas, and fiber lasers used in semiconductor processing, biotechnology and medical device, metrology, and material processing industries; and differential pressure, micro-gyro, fuel, and other sensors used in automobiles, as well as non-contact temperature measurement sensors for the medical industry. Further, the company designs and fabricates application-specific crystals, lenses, prisms, mirrors, laser components, and substrates; and other custom and standard borosilicate, clear fused quartz, and synthetic fused silica glass products. It serves original equipment manufacturers of optical communication components, modules and sub-systems, industrial lasers, automotive components, medical devices, and sensors. The company was incorporated in 1999 and is based in George Town, the Cayman Islands.

Lumen Technologies, Inc., a facilities-based technology and communications company, provides various integrated products and services to business and residential customers in the United States and internationally. The company operates in two segments, Business and Mass Markets. It offers dark fiber, edge cloud services, internet protocol, managed security, software-defined wide area networks, secure access service edge, unified communications and collaboration, and optical wavelengths services; ethernet and VPN data networks services; and legacy services to manage cash flow, including time division multiplexing voice, private line, and other legacy services, as well as sells communication equipment, and IT solutions. The company also provides high speed and lower speed broadband service to residential and small business customers; local and long-distance voice services, professional services, and other ancillary services; and federal broadband and state support programs. It serves its products and services under the Lumen, Quantum Fiber, and CenturyLink brands. The company was formerly known as CenturyLink, Inc. and changed its name to Lumen Technologies, Inc. in September 2020. Lumen Technologies, Inc. was incorporated in 1968 and is headquartered in Monroe, Louisiana.

Infinera Corporation manufactures semiconductors, and supplies networking equipment, optical semiconductors, software, and services worldwide. It provides Infinera GX series for modular and sled-based platforms to support a various transport network applications; Infinera Cloud Xpress Family that is designed to meet the needs of internet content providers (ICPs), communication service providers, internet exchange service providers, enterprises, and other large-scale data center operators; and Infinera XT series, a platform that is designed to power cloud scale network services over metro, DCI, long-haul, and subsea networks. The company also offers Infinera 7300 series, an SDN-ready coherent optical transport system; and Infinera FlexILS open optical line system that connects various Infinera and third-party terminal equipment platforms over long-distance fiber optic cable providing switching, multiplexing, amplification, and management channels. In addition, it provides packet-optical transport platforms comprising Infinera XTM series, Infinera 7100 Series, Infinera mTera series, and Infinera 7090 series, as well as Infinera XTC series, a multi-terabit packet optical transport platforms that integrates digital OTN switching and optical DWDM transmission; and ICE-X, a suite of coherent pluggable optics designed to address point-to-point and point-to-multipoint transport applications from the network edge to the core. Further, the company offers Infinera Transcend Software Suite, a software platform, that provides automation capabilities, software tools, and applications for network operators. It markets and sells its products and related support services primarily through its direct sales force. The company was formerly known as Zepton Networks. Infinera Corporation was incorporated in 2000 and is headquartered in San Jose, California.

Applied Optoelectronics, Inc. designs, manufactures, and sells fiber-optic networking products in the United States, Taiwan, and China. It offers optical modules, optical filters, lasers, laser components, subassemblies, transmitters and transceivers, turn-key equipment, headend, node, distribution equipment, and amplifiers. The company sells its products to internet data center operators, cable television, telecom equipment manufacturers, fiber-to-the-home, and internet service providers through its direct and indirect sales channels. Applied Optoelectronics, Inc. was incorporated in 1997 and is headquartered in Sugar Land, Texas.

nLIGHT, Inc. designs, develops, manufactures, and sells semiconductor and fiber lasers for industrial, microfabrication, and aerospace and defense applications. The company operates in two segments, Laser Products and Advanced Development. It offers semiconductor lasers with various ranges of power levels, wavelengths, and output fiber sizes; and programmable and serviceable fiber lasers for use in industrial and aerospace and defense applications. The company also provides laser sensors, including light detection and ranging technologies for intelligence, surveillance, and reconnaissance applications; and fiber amplifiers, beam combination, and control systems for use in high-energy laser systems in directed energy applications. It sells its products through direct sales force in the United States, China, South Korea, and European countries, as well as through independent sales representatives and distributors in Asia, Australia, Europe, the Middle East, and South America. The company was formerly known as nLight Photonics Corporation and changed its name to nLIGHT, Inc. in January 2016. nLIGHT, Inc. was incorporated in 2000 and is headquartered in Camas, Washington.

LightPath Technologies, Inc. designs, develops, manufactures, and distributes optical components and assemblies. It offers precision molded glass aspheric optics, molded and diamond-turned infrared aspheric lenses, and other optical components used to produce products that manipulate light; and infrared products, including catalog and custom infrared optics. The company's products are used in defense products, medical devices, laser aided industrial tools, automotive safety applications, barcode scanners, optical data storage, hybrid fiber coax datacom, telecommunications, machine vision and sensors, and other sectors. It sells its products directly to customers in Europe and Asia. LightPath Technologies, Inc. was founded in 1985 and is headquartered in Orlando, Florida.

Lantronix, Inc. develops, markets, and sells industrial and enterprise internet of things (IoT) products and services in the Americas, Europe, the Middle East, Africa, and the Asia Pacific Japan. The company's embedded IoT solutions provides embedded products, including compute system-on-module and system-in-package solutions that offers capabilities collect, analyze, and interpret digital information using specialized artificial intelligence/machine learning algorithms; and IoT compute products which provides application processing solutions for data transformation, computer vision, machine learning, augmented/virtual reality, and custom applications, as well as software tools for industrial automation, automotive systems, and smart city infrastructure. It also provides IoT Systems Solutions, which include wired and wireless connections which enhances modern electronic systems and equipment by providing secure network connectivity, power for IoT end devices through power over ethernet (PoE), application hosting, protocol conversion, media conversion, secure access for distributed IoT deployments, and other functions; PoE products for support of remote devices, such as camera and wireless access points; smart tracking devices; and advanced out-of-band products, including console and power management, and IP-connected keyboard-video-mouse. In addition, the company offers a SaaS platform that enables customers to deploy, monitor, manage, and automate deployments; multitenancy functionality for support of customer separation and data security; and multidisciplinary engineering services for IoT product development, including hardware, software, mechanical engineering, rapid prototyping, and quality assurance. Lantronix, Inc. was incorporated in 1989 and is based in Irvine, California.