低群遅延分散（GDD）超高速ミラー
低群遅延分散（GDD）HRミラーはフェムト秒レーザーを取り巻くアプリケーション用に開発された製品です。 特定の波長、入射角度（AOI）において、フェムト秒レーザーに最適化された性能を発揮します。
- 0度、または45度入射された特定のレーザーに対し、本ミラーのマルチレイヤーコーティング層は高い反射率を実現します。
- Laser line HRコーティングはわずかな損失も認められない外部ビームマニピュレーションなどにも使われています。
- Altechna社製 光学部品は、Ti:Sapphire、Nd:Glass、Er:Glass、イットリビウムがドープされたレーザー、またその高調波に最適です。
- フェムト秒レーザーの励起用のHRミラーも提供しています。
特長
- 高反射率（R>99%）
- 低群遅延分散（GDD）
- 高いダメージ閾値
HR>99%@760-840 nm, AOI=0 deg
HR>99%@760-840 nm, AOI=45 deg
HR>99%@760-840 nm, AOI=45 deg
HRsp@760-840 nm, AOI=45 deg
Experimental graph can slightly differ from theoretical curve (1-2%).
仕様
| Measured reflectivity | R>99% @ 0 deg; R=(Rs+Rp)/2, R>99% @ 45 deg |
|---|---|
| Coating | High reflectivity (R>99.5%) dielectric coating for ultrashort pulses |
| Adhesion and Durability | Per MIL-C-675A |
| Clear Aperture | >90% of diameter |
| Laser Damage Threshold | >100 mJ/cm², 50 fsec, 800 nm typical |
| Surface Flatness | λ/8 at 632.8 nm |
| Thickness Tolerance | ±0.25 |
| Dimension Tolerance | +0.0/-0.1 mm |
| Chamfer | 0.3 mm at 45° typical |
| Wedge | <1 arcmin |
製品群
| モデル | 波長域 (nm) | 入射角 | 大きさ (mm) |
|---|---|---|---|
| For Er:Glass 1st harmonic | 1520-1580 | 0° | ø12.7×2 |
| For Er:Glass 1st harmonic | 1520-1580 | 0° | ø25.4×5 |
| For Er:Glass 1st harmonic | 1520-1580 | 0° | ø50.8×6 |
| For Er:Glass 1st harmonic | 1520-1580 | 45° | ø12.7×2 |
| For Er:Glass 1st harmonic | 1520-1580 | 45° | ø25.4×5 |
| For Er:Glass 1st harmonic | 1520-1580 | 45° | ø50.8×6 |
| For Nd:Glass 1st harmonic | 1030-1060 | 0° | ø12.7×2 |
| For Nd:Glass 1st harmonic | 1030-1060 | 0° | ø25.4×5 |
| For Nd:Glass 1st harmonic | 1030-1060 | 0° | ø50.8×6 |
| For Nd:Glass 1st harmonic | 1030-1060 | 45° | ø12.7×2 |
| For Nd:Glass 1st harmonic | 1030-1060 | 45° | ø25.4×5 |
| For Nd:Glass 1st harmonic | 1030-1060 | 45° | ø50.8×6 |
| For Yb doped material 1st harmonic | 1000-1060 | 0° | ø12.7×2 |
| For Yb doped material 1st harmonic | 1000-1060 | 0° | ø25.4×5 |
| For Yb doped material 1st harmonic | 1000-1060 | 0° | ø50.8×6 |
| For Yb doped material 1st harmonic | 1000-1060 | 45° | ø12.7×2 |
| For Yb doped material 1st harmonic | 1000-1060 | 45° | ø25.4×5 |
| For Yb doped material 1st harmonic | 1000-1060 | 45° | ø50.8×6 |
| For Yb:YAG pumping | 980 | 0° | ø25.4×5 |
| For Yb:YAG pumping | 980 | 0° | ø50.8×6 |
| For Yb:YAG pumping | 980 | 45° | ø25.4×5 |
| For Yb:YAG pumping | 980 | 45° | ø50.8×6 |
| For Yb:KGW/KYW pumping | 940 | 0° | ø25.4×5 |
| For Yb:KGW/KYW pumping | 940 | 0° | ø50.8×6 |
| For Yb:KGW/KYW pumping | 940 | 45° | ø25.4×5 |
| For Yb:KGW/KYW pumping | 940 | 45° | ø50.8×6 |
| For Ti:Sapphire 1st harmonic | 760-840 | 0° | ø12.7×2 |
| For Ti:Sapphire 1st harmonic | 760-840 | 0° | ø25.4×5 |
| For Ti:Sapphire 1st harmonic | 760-840 | 0° | ø50.8×6 |
| For Ti:Sapphire 1st harmonic | 760-840 | 45° | ø12.7×2 |
| For Ti:Sapphire 1st harmonic | 760-840 | 45° | ø25.4×5 |
| For Ti:Sapphire 1st harmonic | 760-840 | 45° | ø50.8×6 |
| For Ti:Sapphire pumping | 527-532 | 0° | ø25.4×5 |
| For Ti:Sapphire pumping | 527-532 | 0° | ø50.8×6 |
| For Ti:Sapphire pumping | 527-532 | 45° | ø25.4x5 |
| For Ti:Sapphire pumping | 527-532 | 45° | ø50.8x6 |
| For Nd:Glass 2nd harmonic | 515-545 | 0° | ø12.7x2 |
| For Nd:Glass 2nd harmonic | 515-545 | 0° | ø25.4x5 |
| For Nd:Glass 2nd harmonic | 515-545 | 0° | ø50.8x6 |
| For Nd:Glass 2nd harmonic | 515-545 | 45° | ø12.7x2 |
| For Nd:Glass 2nd harmonic | 515-545 | 45° | ø25.4x5 |
| For Nd:Glass 2nd harmonic | 515-545 | 45° | ø50.8x6 |
| For Yb doped material 2nd harmonic | 500-530 | 0° | ø12.7x2 |
| For Yb doped material 2nd harmonic | 500-530 | 0° | ø25.4x5 |
| For Yb doped material 2nd harmonic | 500-530 | 0° | ø50.8x6 |
| For Yb doped material 2nd harmonic | 500-530 | 45° | ø12.7x2 |
| For Yb doped material 2nd harmonic | 500-530 | 45° | ø25.4x5 |
| For Yb doped material 2nd harmonic | 500-530 | 45° | ø50.8x6 |
| For Ti:Sapphire 2nd harmonic | 380-420 | 0° | ø12.7x2 |
| For Ti:Sapphire 2nd harmonic | 380-420 | 0° | ø25.4x5 |
| For Ti:Sapphire 2nd harmonic | 380-420 | 0° | ø50.8x6 |
| For Ti:Sapphire 2nd harmonic | 380-420 | 45° | ø12.7x2 |
| For Ti:Sapphire 2nd harmonic | 380-420 | 45° | ø25.4x5 |
| For Ti:Sapphire 2nd harmonic | 380-420 | 45° | ø50.8x6 |
| For Yb doped material 3rd harmonic | 333-353 | 0° | ø12.7x2 |
| For Yb doped material 3rd harmonic | 333-353 | 0° | ø25.4x5 |
| For Yb doped material 3rd harmonic | 333-353 | 0° | ø50.8x6 |
| For Yb doped material 3rd harmonic | 333-353 | 45° | ø12.7x2 |
| For Yb doped material 3rd harmonic | 333-353 | 45° | ø25.4x5 |
| For Yb doped material 3rd harmonic | 333-353 | 45° | ø50.8x6 |
| For Ti:Sapphire 3rd harmonic | 257-275 | 0° | ø12.7x2 |
| For Ti:Sapphire 3rd harmonic | 257-275 | 0° | ø25.4x5 |
| For Ti:Sapphire 3rd harmonic | 257-275 | 0° | ø50.8x6 |
| For Ti:Sapphire 3rd harmonic | 257-275 | 45° | ø12.7x2 |
| For Ti:Sapphire 3rd harmonic | 257-275 | 45° | ø25.4x5 |
| For Ti:Sapphire 3rd harmonic | 257-275 | 45° | ø50.8×6 |
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