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Image of Lithium Niobate processing, design, packaging and manufacturing with LN modulators

On behalf of our client, FUJITSU, yet2 announces that the company is seeking to expand new business opportunities and partnerships related to Lithium Niobate Processing. FUJITSU developed modulators to improve LiNbO3 (a.k.a. Lithium Niobate or simply “LN”) processing, design, packaging and manufacturing capabilities (“LN TECHNOLOGY”).


LN is a stable inorganic material. When voltage is applied, its refractive index changes dramatically. This mechanism is critical for enabling proper operation and control of modulators using DC bias voltage. When DC voltage is applied over time, an undesirable phase shift occurs. This phenomenon is known as DC drift.

FUJITSU developed the first modulators to overcome the issue and began mass producing reliable LN modulators.  Zero-chirp is required for multi-valued phase modulation using LN. The company further developed low voltage and low loss LN modulators using dry etching technology (RIE) to produce square ridge waveguides and smooth ridge sidewalls. As a result, FUJITSU has become the largest supplier of these high-performance modulators, shipping its one millionth Coherent Lithium-Niobate Modulator earlier this year.

FUJITSU is looking for technology and commercial partners in five areas that it believes offer business growth opportunities:

  • Electro-optic (EO) Q switch
  • EO modulator
  • Optical micro-ring resonator
  • Micro Kerr Frequency combs
  • Surface acoustic wave sensors and filters (in certain markets).


Technology Description

Process Capability

Photo-lithography Exposure
Resist application
Resist application and Developing
Deposition Vapor deposition
Sputter deposition
Electro gold plating process
Etching Wet etching
Dry etching
Cleaning/ Other Surface cleaning
Thermal diffusion and Annealing
Test and Analysis RF characteristics
Optical characteristics


Module Capability

Process Equipment
PD chip die bonding Die bonder
LN chip and resistance substrate mounting Auto-mounting machine
Au wire bonding Wire bonder
Optical axis alignment Auto-alignment machine
Fixation with adhesive (lens, fiber, etc.) UV light source
Welding (lens, fiber, etc.) Welder
Soldering (fiber sealing) High-frequency heater
Vacuum baking Vacuum baking oven
Lid sealing (parallel seam weld) Sealing apparatus
Annealing Temperature chamber
Test (DC characteristics) Auto-test machine
Test (RF characteristics) Optical component analyzer



What is the technology and what are its benefits?

  • Fujitsu developed the first truly effective LN Modulators and seeks technological and commercial partners to expand lithium niobate processing, design, packaging and manufacturing capabilities.
  • Superior reliability: able to meet highly secured legacy carrier network requirements
  • Competitive cost: able to realize best mix of specifications among design, process conditions and equipment.
  • Large capacity: fully-capitalized to fulfill expected demand; highly experienced, skilled, technically-trained operators to efficiently meet delivery requirements

What problem does this technology solve?

  • High bit rates for high performance applications. LN enabled up to 400Gbps solutions earlier than SiP and InP.

Is it unique? What is its key difference vs. other technologies?

  • High reliability is the key factor, allowing customers to maintain desired operation of indispensable component lines. Competitors had to withdraw from the market due to their poor performance with drift management issues.
  • In addition to this, effectively optimized and used rare optical materials that exceeded supplier specifications. For all the reasons mentioned above, the company’s global market share has steadily grown to more than two-thirds and has achieved costs and capacity around the world that others cannot compete with.

What are the closest competing products / technologies? Who owns them?

  • Competing products and technologies: CDM, ITTRA, ICTROSA
  • Companies with these products:
    • InP Technology – Lumentum, II-VI(Finisar), Neophotonics
    • SiP Technology – Acacia, Elenion, Inphi


IP Portfolio

The intellectual property (IP) supporting these FUJITSU technologies is extensive, although some of the basic patents are aging or expired.

FUJITSU has filed multiple additional patents worldwide. FUJITSU also owns proprietary methods and trade secrets, which it uses to offer significant process and product advantages to its partners and customers. In addition to the patent portfolio, FUJITSU possesses other IP and know-how, research methods, process and product development equipment, testing protocols and data, and human capital, all of which make the company and strong partner and supplier.

Partnership Opportunities

FUJITSU is open to a variety of forms of collaboration including joint development, co-marketing, co-manufacturing, technology licensing and asset acquisition.

Company Overview

FUJITSU Optical Components is the global leader of LN modulators for Lithium Niobate Processing, Design, Packaging, and Manufacturing Capabilities

Fujitsu Optical Components (FOC), located in Nakahara-ku, Kawasaki-shi, Kanagawa, Japan, is a wholly-owned subsidiary of Fujitsu Limited. For more than 30 years, FOC has been a leader in systems, components, and devices used in the optical communications industry. FOC develops, manufactures and sells the most advanced optical components for 100G & beyond optical networks, including coherent transceivers (CFP DCO, CFP2 ACO), 100G CFP/CFP2 transceivers, 100G QSFP28 transceivers, 100G/400G LN modulators and 100G/400G integrated coherent receivers. They are currently the global leader in producing LN modulators for lithium niobate processing, design, packaging and manufacturing.

Value Proposition

FUJITSU’s strong market position, its technology, capability and manufacturing (assembly and wafer processing) advantages, financial capital, and forward-looking strategy establish the company as an excellent partner for companies seeking to build growth businesses in areas such as electro-optic (EO) Q-switches, high bandwidth, low voltage, and low loss electro-optic EO modulators, optical micro-ring resonators, micro Kerr frequency combs, and surface acoustic wave sensors and filters

Further Information

Additional information covering the FUJITSU’s capabilities and interests and certain other topics not subject to confidentiality requirements can be provided to prospective partners having credible business interests.

Extensive additional information and direct contact with FUJITSU’s key executives and technologists may be made available to qualified interested parties under the provisions of a confidential disclosure agreement.

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