physics

Tatsuo Izawa

Tatsuo Izawa is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tatsuo Izawa rather than just read about it. In short: Tatsuo Izawa (Japanese: 伊澤達夫; born December 24, 1941) is a Japanese researcher known for his work on fiber-optic communication. Early life and education Izawa was born on December 24, 1941 in Tokyo.

Key takeaways

Tatsuo Izawa belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tatsuo Izawa to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tatsuo Izawa from memory before moving on to harder problems.

Reference excerpt

Tatsuo Izawa (Japanese: 伊澤達夫; born December 24, 1941) is a Japanese researcher known for his work on fiber-optic communication.

Early life and education Izawa was born on December 24, 1941 in Tokyo. During World War II, his family temporarily moved to a rural area of Nagano Prefecture, before returning to Tokyo. He attended Tokyo Metropolitan Nishi High School and entered the University of Tokyo in 1961. He received a Bachelor of Engineering degree from the University of Tokyo in 1965 and completed a doctorate in electronic engineering there in 1970.

Career After completing his doctorate in 1970, Izawa joined the Electrical Communication Laboratories of the Nippon Telegraph and Telephone Public Corporation. At the Musashino laboratory, he studied semiconductor lasers dynamics and the use of electromigration to alter the refractive index of glass. Izawa later began investigating the production of low-loss optical fiber. He spent about a year as a visiting researcher at the University of California, Berkeley, studying metal-insulator structures and infrared detectors. He then returned to NTT and transferred to its Ibaraki laboratory in 1975. Izawa devised the VAD method in 1977. In 1998, Izawa became president, and chief executive officer of NTT Electronics, an NTT subsidiary that manufactured optical and electronic components. He became a corporate adviser in 2004 and a senior adviser in 2007. In 2007, Izawa joined the Tokyo Institute of Technology as executive vice president responsible for research and industry collaboration. Izawa later served as president and chair of the governing board of the Chitose Institute of Science and Technology.

Honors and awards Izawa received an achievement award from the International Society for Optical Engineering in 1980. In 1982, he received Japan's Imperial Invention Award for his optical-fiber research. He was awarded the Medal with Purple Ribbon by the Japanese government in 1998. In 2001, Optica and the IEEE Lasers and Electro-Optics Society awarded Izawa the John Tyndall Award for his contributions to optical-fiber technology. He was elected a Fellow of Optica in 2002. Izawa was elected a foreign member of the United States National Academy of Engineering in 2004. His election citation recognized his invention and refinement of the VAD method for manufacturing optical fiber. In 2007, Izawa shared the C&C Prize with Robert D. Maurer of Corning and John B. MacChesney of Bell Labs. The NEC C&C Foundation recognized the three engineers for their respective pioneering contributions to the development and manufacture of low-loss optical fiber.

References

Worked examples

Example 1 — a first encounter with Tatsuo Izawa

Start with the simplest possible case. Write down what Tatsuo Izawa claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tatsuo Izawa before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tatsuo Izawa ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tatsuo Izawa

In research: Tatsuo Izawa appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tatsuo Izawa in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tatsuo Izawa is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1941 births, Academic staff of Tokyo Institute of Technology, Fiber-optic communications, so understanding it makes those chapters shorter.
In everyday life: Look for Tatsuo Izawa outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tatsuo Izawa in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tatsuo Izawa means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tatsuo Izawa out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tatsuo Izawa in simple terms?

Tatsuo Izawa (Japanese: 伊澤達夫; born December 24, 1941) is a Japanese researcher known for his work on fiber-optic communication. Early life and education Izawa was born on December 24, 1941 in Tokyo.

Why does Tatsuo Izawa matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tatsuo Izawa?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tatsuo Izawa.