Japan Military News, Reports, Data, etc.

taxiya said:

Corrections:
The solid laser research is unrelated to the weapon test. Don't mix up things.
The next stage target is 50kw instead of 150kW. And according to your yahoo link, it is suspected to be shooting a UAV within 1km.
The test weapon is based on gas laser.

For the non-Japanese readers, see the highlight and translation from the linked pdf file above.

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新たな研究は、実用的兵器開発になるのか不明であるが、防衛装備庁の研究成果が、

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など協力会社と表裏一体となって実用的兵器開発に直結すると思われます。

新研究は、瞬間対処性が高く、精密誘導弾等のみならず、近距離から発射されるロケット弾等への対処が可能な艦船搭載型及び車両移動型の近接防空システムの実現を目指すと思われます。

高出力レーザシステムは、対処時間が限られる近接した脅威に対しての瞬間対処性及び複数の脅威に対しての多目標対処性を有することから、近接防空用として少なくとも100～150ｋｗ級になると思われます。

新たな研究は、化学レーザーではなく、公募で固体レーザー方式のひとつである「ゼノフォノンライン励起新型高出力Ｙｂ：ＹＡＧセラミックレーザー」が選定された。

　防衛装備庁で進められてきた「高出力レーザーシステム構成要素の研究試作」では、化学（ヨウ素）レーザーを使用したシステムの研究が進められてきたが、米国等では固体レーザーが主流になっている。防衛装備庁も２０１８年以降の研究開発においては固体レーザーを基本としたシステムを計画しているようだ。

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は

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と比べて活性中心の濃度がはるかに高いため、比較的小型ながら高い増幅利得が得られ、また発振出力も大きいという特徴を持つ。

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YAG blocks are easier to fabricate and scale up in size, which also translates to greater laser power. Neodymium:GGG can be made only in sizes up to six inches. And, the ceramic material resists cracking better than the crystalline neodymium:GGG.

The transparent ceramic slabs also allow greater versatility in the pumping architecture. Instead of pumping off of the face of the neodymium:GGG slab, YAG slabs enables pumping off of the four edges of the slab. The laboratory’s slabs are framed with samarium-doped YAG, and this provides better uniformity of temperature, which improves laser beam quality. The laboratory currently is buying its YAG blocks from Konoshima Chemical Company in Japan, but it also has its own internal research and development effort in transparent ceramics for laser-gain media, Yamamoto notes.

Yamamoto shares that the laboratory has not received funding for the final push to achieve a 100-kilowatt beam with a solid-state laser. It continues to strive to improve beam quality with its existing construct. This will increase the distance a beam can travel through the atmosphere. The laboratory hopes to further validate its edge-pumping architecture as a key to significant beam quality improvement, which in turn may lead to renewed funding.

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SamuraiBlue said:

Again ignorantly bliss.

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JSDF finished the first stage development last year and had already made budget requisition for the next stage of research targeting a 150kW laser.

Solid state lasers utilizing Ceramics was developed in Japan.

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When they first announced it US DoD immediately made request for dozens of samples to verify their claim.

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taxiya said:

Playing your tactic of "forgetting your own words" again?

Let's revisit what you said in the original post. See the bold texts, that is your words, remember?
​

Now, go back to the highlight I made. The first stage is 15KW, nothing else. Am I wrong in reading "your" language? Seriously, 30% to 40% Japanese written language is Chinese with the same meaning. Telephone in English is Telefon in German, same between Japanese and Chinese. My "Japanese" reading capability is sufficient to not be fooled by you.

Why don't you admit that you "misquoted" 50kw as 150kw first before you jump up from the chair? Again, your tactic of "forgetting" what you just said? And no courage to just say "ok, I made a mistake"?


The 50kw is the same machine of 15kw improvement, but that is not tested according to the official report. It is clearly said the goal of third stage, do you have problem in understanding Japanese? Or you question the accuracy of the Japanese government?

So, I beg the question, which part of my error correction was wrong? P.S. don't bother to answer, and I won't bother to reply as I expect the same tactics from you.

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Jeff Head said:

Alright! Here's the first of the Advanced Atago AEGIS DDGs. She'll be ready to launch very soo.

When both are completed the Japanese will have eight full AEGIS DDGs, and six of their own AEGIS-like vessels in the Akizuki and the two follow on Ashai vessels.

This vessel will ultimately get the latest AEGIS gear as well as the potential for a Japanese or other allied laser weapon system.

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timepass said:

Japan Building New Aircraft carrier – More advanced than the UK or US supercarrier?

Japan once had the second-most powerful carrier force in the world – on December 7, 1941. On that date, they had six fleet carriers and five light carriers in service, with two fleet carriers on the way. That was in comparison to the United States, which had seven fleet carriers in service with a whole lot of carriers on the way.


Japan is proposing to develop its first aircraft carriers since the Second World War to counter Chinese expansionism in the region and the threat posed by North Korea.

Under a £3 billion plan the Japanese navy would convert two 248m Izumo-class helicopter carriers to handle American F-35 jump-jet fighters, giving the country its first naval airstrike capability in more than 70 years.

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Jura said:

saw that news earlier this week while on my kid's tablet LOL
it's

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...

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Japan said on Monday it had picked Lockheed Martin Corp to build a powerful new $1.2 billion radar for two ground-based Aegis ballistic missile defense stations meant to guard against North Korean missile strikes.

“By using this new radar we will increase our ability to cope with missiles on lofted trajectories raising the level of ballistic missile defense,” Japanese Minister of Defence Itsunori Onodera told reporters.

The decision is the latest sign that Japan is forging ahead with plans to reinforce its defenses despite a North Korean pledge to denuclearize. The purchase could also help Tokyo ease trade friction with Washington as its key ally threatens to impose tariffs on Japanese auto imports.

The two radars will cost around 130 billion yen ($1.17 billion) each, with maintenance and other operational costs putting the estimated budget at the two sites over 30 years at 466 billion yen, according to a Ministry of Defence news release.

Other outlays, including for missile launchers, interceptors, buildings and defenses for the two sites, will add to the final tally.

The radar decision means Aegis Ashore can be added to a defense budget proposal slated for release next month ahead of any meeting between Japanese Prime Minister Shinzo Abe and U.S. President Donald Trump in September, when Abe is expected to attend the United Nations in New York.

Trump has cranked up pressure on Tokyo with tariffs on steel and threats of levies on car imports, although during a visit to Tokyo in November he welcomed Japan’s procurement of Lockheed Martin F-35 stealth fighters and urged Japan to buy more U.S. weapons and “billions and billions of dollars of additional products of all kinds”.

The Aegis Ashore radar choice was between Raytheon Co’s Spy-6 radar, designed to upgrade the U.S. Navy’s fleet of Aegis warships, and a version of Lockheed Martin Corp’s Long Range Discrimination Radar, which will be deployed in the Ground-Based Midcourse Defense anti-ballistic missile system in Alaska around 2020.

Both radars have far greater ranges than current Aegis radars operated by Japan or the U.S.

Japan needs more powerful detection in order for its new longer-range interceptor missiles to provide more effective defense against North Korean launches and any potential threat from China.

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