JP2012164981A - 基板部材上に構成された複数のエミッタを有するレーザーパッケージ - Google Patents
基板部材上に構成された複数のエミッタを有するレーザーパッケージ Download PDFInfo
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Abstract
【解決手段】レーザー素子は、緑色レーザー光または青色レーザー光を出射する複数のレーザーエミッタを含む。これらのレーザーエミッタからの放射を光学的に組み合わせるように、少なくとも1つの光学部材が基板に統合されて配置される。
【選択図】図9
Description
本出願は、米国仮出願61/435,578号(出願日:2011年1月24日(ドケット番号027364−013600US))に対する優先権を主張する。ここに、同文献を全目的のために援用する。
・従来の電球によって利用されるエネルギーのうち約90%を超えるエネルギーが、熱として消散される。
・従来の電球では、フィラメント部材の熱膨張および熱収縮に起因して故障することが多い。
・従来の電球は、広範なスペクトルに渡って発光し、このようなスペクトルのうちほとんどは、ヒトの目には知覚できない。
・従来の電球は全方向に発光し、高い指向性または集束(例えば、投写型ディスプレー、光学データ保存装置など)を必要とする用途には不向きである。
・厚さが100nm〜3000nmであり、Siドープレベルが5E17〜3E18cm−3であるn−GaNクラッド層
・InGaNを含むn側SCH層であって、インジウムのモル分率が2%〜10%であり、厚さが20〜200nmである、n側SCH層
・少なくとも2つの2.0〜8.5nmInGaN量子井戸と、必要に応じて約12nmまでのGaNまたはInGaN障壁とを含む複数の量子井戸活性領域層であって、前記少なくとも2つの2.0〜8.5nmInGaN量子井戸は、1.5nm以上の間隔を空けて設けられる、複数の量子井戸活性領域層
・InGaNまたは上側GaNガイド層を含むp側SCH層であって、インジウムのモル分率が1%〜10%であり、厚さが15nm〜100nmである、p側SCH層
・AlGaNを含む電子ブロッキング層であって、アルミニウムのモル分率が6%〜22%であり、厚さが5nm〜20nmであり、Mgでドープされた電子ブロッキング層
・厚さが400nm〜1000nmであり、Mgドープレベルが2E17cm−3〜2E19cm−3である、p−GaNクラッド層
・厚さが20nm〜40nmであり、Mgドープレベルが1E19cm−3〜1E21cm−3である、p++−GaN接触層
Claims (25)
- レーザー素子であって、
ガリウムおよび窒素材料を含む基板、当該基板は、半極性配向または無極性配向によって特徴付けられる表面領域を有し、また当該基板は、前側および後側を有する、と、
前記基板内に配置された少なくとも1つの活性領域と、
前記活性領域上に形成されたN個のエミッタのアレイ、ここで、Nは3よりも多く、前記N個のエミッタのアレイは、実質的に互いに平行であり、前記前側と前記後側との間に配置され、前記N個のエミッタはそれぞれ、前記前側で放射を出射するように構成され、前記N個のエミッタのアレイは、青色波長または緑色波長と関連し、前記N個のエミッタのアレイは、平均動作電力が少なくとも25mWであり、前記N個のエミッタはそれぞれ、長さおよび幅によって特徴付けられ、当該長さは少なくとも400umであり、当該幅は少なくとも1umである、と、
前記N個のエミッタのアレイに電気的に接続された少なくとも1つの電極と、
前記エミッタからの放射を光学的に組み合わせるように、前記基板の前記前側に配置された少なくとも1つの光学部材と、
を備える、レーザー素子。 - 前記レーザー素子は、少なくとも150,000ppmvの酸素ガスを含む環境において動作可能であり、
前記レーザー素子は、前記酸素ガスからの経時的効率低下が実質的に無い、
請求項1に記載のレーザー素子。 - 前記レーザー素子は、AlGaNクラッドまたはInAlGaNクラッドを実質的に含まず、
前記エミッタはそれぞれ、前ファセットおよび後ファセットを含み、当該前ファセットには実質的にコーティングが施されていない、
請求項1に記載のレーザー素子。 - 前記基板に熱的に結合した微細通路クーラーと、
サブマウント、当該サブマウントは、前記基板およびヒートシンクに関連付けられた熱膨張係数(CTE)によって特徴付けられる、と
をさらに備える請求項1に記載のレーザー素子。 - 前記基板に接続されたサブマウントをさらに備え、当該サブマウントは、窒化アルミニウム、BeO、ダイヤモンド、複合ダイヤモンド、またはこれらの組み合わせの少なくとも1つを含む材料によって構成される、
請求項1に記載のレーザー素子。 - 前記基板はサブマウント上に接着され、前記サブマウントは、熱伝導性が少なくとも200W/(mk)である点によって特徴付けられる、
請求項1に記載のレーザー素子。 - 前記基板は、少なくとも1つのクラッド領域を含む、
請求項1に記載のレーザー素子。 - 前記少なくとも1つの光学部材は、速軸コリメートレンズを含む、
請求項1に記載のレーザー素子。 - 前記レーザー素子は、スペクトル幅が少なくとも4nmである点によって特徴付けられ、Nは3〜50である、
請求項1に記載のレーザー素子。 - 前記N個のエミッタそれぞれの平均出力は25〜1000mWである、
請求項1に記載のレーザー素子。 - 前記N個のエミッタそれぞれの平均出力は1Wよりも高い、
請求項1に記載の素子。 - 前記N個のエミッタは、それぞれ3um〜300umの間隔を空けて配置される、
請求項1に記載の素子。 - レーザー素子であって、
ガリウムおよび窒素材料を含む基板、当該基板は、半極性配向または無極性配向によって特徴付けられる表面領域を有し、当該基板は前側および後側を有する、と、
前記基板内に配置された少なくとも1つの活性領域と、
前記少なくとも1つの活性領域上に形成されたN個のエミッタのアレイ、ここで、Nは3よりも多く、当該N個のエミッタのアレイは、実質的に互いに平行であり、前記前側と前記後側との間に配置され、当該N個のエミッタはそれぞれ、前記前側で放射を出射するように構成され、当該N個のエミッタのアレイは、青色波長または緑色波長と相関し、当該N個のエミッタのアレイは、平均動作電力が少なくとも25mWである点によって特徴付けられ、当該N個のエミッタはそれぞれ、長さおよび幅によって特徴付けられ、当該長さは少なくとも400umであり、当該幅は少なくとも1umである、と、
前記N個のエミッタのアレイに電気的に接続された少なくとも1つの電極と、
前記エミッタからの放射を光学的にコリメートするように、前記基板の前記前側に配置された少なくとも1つの光学部材と、
第1の基板に熱的に結合したヒートシンクと、
を備える、レーザー素子。 - 前記第1の基板上に積層された第2の基板をさらに備える、
請求項13に記載のレーザー素子。 - 前記第1の基板の側部に積層された第2の基板をさらに備える、
請求項13に記載の素子。 - レーザー素子であって、
ガリウムおよび窒素材料を含む基板、当該基板は、半極性配向または無極性配向によって特徴付けられる表面領域を有し、当該基板は上側および下側を有する、と、
前記第1の基板の上側の近傍に配置されたN個の活性領域、ここで、Nは3よりも多く、前記活性領域はそれぞれ、p型と関連付けられたドープ領域を含む、と、
前記ドープ領域上に形成されたN個のエミッタのアレイ、当該N個のエミッタのアレイは、実質的に互いに平行であり、当該N個のエミッタはそれぞれ、前記前側で放射を出射するように構成され、当該N個のエミッタのアレイは、平均動作電力が少なくとも25mWである点によって特徴付けられ、当該N個のエミッタはそれぞれ、長さおよび幅によって特徴付けられ、当該長さは少なくとも400umであり、当該幅は少なくとも1umである、と、
前記N個のエミッタのアレイに電気的に接続された少なくとも1つの電極と、
前記エミッタからの放射を光学的にコリメートするように、前記基板の前記前側に配置された少なくとも1つの光学部材と、
熱放射率が少なくとも0.6である点によって特徴付けられたサブマウントと、
を備える、レーザー素子。 - 前記サブマウントは、ダイヤモンド材料または銅タングステン合金材料または酸化ベリリウム材料を含む、
請求項16に記載のレーザー素子。 - 前記表面領域は、{11−22}面、{20−21}面、または{30−31}面によって、あるいはこれらの面から+/−5度内にある面によって特徴付けられる、
請求項16に記載のレーザー素子。 - 前記サブマウントは、前記基板の前記上側に直接接続される、
請求項16に記載のレーザー素子。 - 前記サブマウントは、前記基板の前記下側に直接接続される、
請求項16に記載のレーザー素子。 - 前記サブマウントは、前記N個のエミッタのアレイに直接接続され、
前記少なくとも1つの光学部材は、コリメートレンズを含む、
請求項16に記載のレーザー素子。 - 前記レーザー素子の出力波長は、約505〜550nm、または425〜475nmである点によって特徴付けられる、
請求項16に記載のレーザー素子。 - 前記サブマウントに熱的に結合したヒートシンクをさらに備える、
請求項16に記載のレーザー素子。 - 前記レーザー素子は、ピーク壁コンセント効率が少なくとも25%である点によって特徴付けられ、
前記N個の活性領域内に配置された少なくとも1つの量子井戸をさらに含む、
請求項16に記載のレーザー素子。 - レーザー素子であって、
前側および後側を有する基板と、
前記基板内に配置された少なくとも1つの活性領域と、
前記活性領域上に形成されたN個のエミッタのアレイ、ここで、Nは3よりも多く、当該N個のエミッタのアレイは、実質的に互いに平行であり、前記前側と前記後側との間に配置され、当該N個のエミッタはそれぞれ、前記前側で放射を出射するように構成され、当該N個のエミッタのアレイは、青色波長または緑色波長と関連し、当該N個のエミッタのアレイは、平均動作電力によって特徴付けられ、当該N個のエミッタはそれぞれ、長さおよび幅によって特徴付けられる、と、
前記N個のエミッタのアレイに電気的に接続された少なくとも1つの電極と、
前記エミッタからの放射を光学的に組み合わせるように、前記基板の前側に配置された少なくとも1つの光学部材と、
を備える、レーザー素子。
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US9595813B2 (en) | 2017-03-14 |
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