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フォトニック結晶ファイバ
Large Mode Area PM photonic crystal fibersシリーズ
特長
- エンドレスシングルモード動作
- 高出力に対応
- 低非線形性
- 低ファイバ損失
- 波長に依存しないMFD
- 偏波保持
製品詳細
Large Mode Area PM photonic crystal fibersシリーズは、低損失かつほぼ一定のモードフィールド径を実現するよう最適化されています。通常、大モードエリアとシングルモード動作はトレードオフの関係にありますが、当社の結晶ファイバによる大口径モード偏波保持ファイバは、エンドレスシングルモード (高次モードのカットオフがない特性)を有し、全波長域にわたり優れたモード品質を提供します。
PM‑1550は強い形状複屈折を有し、偏光間のビート長を短くするよう最適化されています。また、偏光状態間の曲げ結合が抑制され、偏光消光比が向上しているほか、従来の高複屈折ファイバと比べて温度感度が30分の1に低減されています。
これらのLMAファイバは、偏光タイプおよび偏波保持タイプをご用意しています。
コネクタ付きファイバについては、aeroGUIDEパッチコードまたはSuperK ファイバデリバリシステム (FDS)をご覧ください。
仕様
光学的特性
| LMA-PM-5 | LMA-PM-10 | LMA-PM-15 | PM-1550 | |
| シングルモードカットオフ波長 *1 | なし | |||
| 低損失範囲 | 400 nm ～ 1200 nm | 500 nm ～ 1700 nm | 600 nm ～ 1700 nm | |
| 減衰量 @532 nm | < 40 dB/km*2 | < 25 dB/km*2 | – | |
| 減衰量 @632 nm | < 20 dB/km | < 15 dB/km | – | |
| 減衰量 @1064 nm | < 7 dB/km | < 5 dB/km | < 10 dB/km | – |
| 減衰量 @1550 nm | – | ≤ 3 dB/km | ||
| モードフィールド径、1/e² @532 nm | 4.2 μm | 8.4 μm | 12.2 μm | – |
| モードフィールド径、1/e² @1064 nm | 4.4 μm | 8.6 μm | 12.6 μm | – |
| モードフィールド径、1/e² @1550 nm | – | 5.5 μm / 3.8 μm | ||
| 開口数 @532 nm | – | 0.04 | – | |
| 開口数 @1064 nm | 0.2 typ. | 0.12 | 0.07 | – |
| 複屈折 Δn @1064 nm | ≥ 1.5 × 10-4 | ≥ 1.4 × 10-4 | ≥ 1.3 × 10-4 | – |
| 複屈折 Δn @1550 nm | – | ≥ 4e-4 | ||
| 色分散 | – | 55 ps/nm/km | ||
*1 TIA-445-80-C規格。
*2 曲げ直径16 cm。
物理的特性
| LMA-PM-5 | LMA-PM-10 | LMA-PM-15 | PM-1550 | |
| コア径 | 5 μm | 10 μm | 15 μm | 6.3 μm / 4.4 μm |
| クラッド径 | 125 ± 2 μm | 230 ± 5 μm | 300 ± 5 μm | 125 ± 2 μm |
| コーティング径 | 245 ± 10 μm | 350 ± 10 μm | 385 ± 10 μm | 240 ± 10 μm |
| コアおよびクラッド材料 | 純石英 | |||
| コーティング材料 | アクリレート | |||
| コーティング同心度 | < 10 μm | |||
| プルーフテストレベル | 0.5 % | 0.33 % | 0.5 % | |
| 相対パワーハンドリング | 低 | 中 | – | |
| 短波長での相対曲げ損失 | 低 | 中 | – | |
| クラッド非円形度*1 | < 0.7 % | – | ||
*1 クラッド最大径と最小径の差を％で表したもの。
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