High power laser High Power 1550nm ITU CW DFB Laser JDSU CQF938/500 CQF938/400
In modern hybrid fiber coax (HFC) and cable television (CATV) systems, 1550nm externally modulated laser sources are used for super trunking and distribution.Due to the availability of the erbium-doped fiber amplifier (EDFA), which allows re-amplification of the optical signal without conversion into radio frequency (RF), such systems are very flexible in providing custom-made solutions with good carrier-to-noise ratios (CNR). In short haul metro links, the high power of the JDSU CQF938 eliminates the need for additional amplifiers. The CQF938 high power 1550 nm continuous wave (CW) distributed feedback (DFB) laser is available in a standard 14-pin butterfly package equipped with a polarization maintaining fiber (PMF) to facilitate coupling to a modulator. It shows superb thermal stability, high side-mode suppression ratios (SMSR), very low relative intensity noise (RIN), and small linewidths. The modulation bandwidth is in excess of 1 GHz, and permits various techniques for stimulated Brillouin scattering (SBS) suppression. SBS is a detrimental effect that can occur at very high power levels into the fiber, and which leads to noise bursts.
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Overview
Specifications
| Parameter | Value |
|---|---|
| 激光二极管 — 尾纤辐射输出功率 Ppeak [极限值 / CQF938/400] | max:100 mW |
| 激光二极管 — 反向电压 VR [极限值 / CQF938/400] | max:2.0 V |
| 激光二极管 — 正向电流 IF [极限值 / CQF938/400] | max:600 mA |
| 监测二极管 — 反向电压 VR [极限值 / CQF938/400] | max:20 V |
| 监测二极管 — 正向电流 IF [极限值 / CQF938/400] | max:10 mA |
| 模块 — 储存温度范围 Tstg [极限值 / CQF938/400 / 注1：Telcordia GR-468-CORE/MIL-STD-883机械/环境试验] | min:-40 °C；max:85 °C |
| 模块 — 壳体工作温度范围 Top [极限值 / CQF938/400 / 制冷器开启] | min:-20 °C；max:70 °C |
| 光纤尾纤 — 弯曲半径 R [极限值 / CQF938/400] | min:35 mm |
| 光纤尾纤 — 光纤到外壳的抗拉强度 F [极限值 / CQF938/400 / 注1：Telcordia GR-468-CORE/MIL-STD-883机械/环境试验] | max:5 N |
| 尾纤辐射输出功率 Po [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | min:40 mW |
| 差分能量 η [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | typical:120 µW/mA |
| 工作电流 Iop [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | typical:375 mA；max:500 mA |
| 激光二极管 — 阈值电流 Ith [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | typical:25 mA；max:40 mA |
| 激光二极管 — 中心波长 λc [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | min:1547 nm；typical:1555 nm；max:1560 nm |
| 激光二极管 — 正向电压 VF [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | max:2.5 V |
| 激光二极管 — 边模抑制比 SMSR [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | min:30 dB；typical:45 dB |
| 激光二极管 — 光隔离度 ISO [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | min:30 dB；typical:35 dB |
| 激光二极管 — 相对强度噪声 RIN [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值 / 20–1000MHz] | max:-160 dB/Hz |
| 激光二极管 — 光谱线宽 Δλ [特性：除非另有说明，Rth=10kΩ、Tamb=25°C、Po=标称值 / 全宽、半平均值（FWHM）；源文措辞/符号按原文保留] | max:1 MHz |
| 监测二极管 — 监测二极管响应度 R [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值 / VR=10V] | min:5 µA/mW；typical:75 µA/mW |
| 监测二极管 — 暗电流 Imd [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值 / VR=10V] | max:0.1 µA |
| 监测二极管 — 温度跟踪误差 TE [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值 / VR=10V;-20°C<Tcase<70°C] | max:10 % |
| 热敏电阻 — 电阻 Rth [特性：除非另有说明，Rth=10kΩ、Tamb=25°C、Po=标称值 / Tth=25°C] | min:9.5 kΩ；typical:10 kΩ；max:10.5 kΩ |
| 热敏电阻 — 热敏电阻常数 B [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | min:3800 K；max:4100 K |
| 热电制冷器 — 制冷器电流 Icool [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值 / ΔT=45°C] | max:1.5 A |
| 热电制冷器 — 制冷器电压 Vcool [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值 / ΔT=45°C] | max:4.0 V |
| 保偏光纤尾纤 — 光纤类型 [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | Fujikura Panda8/125/400 with900µm loose tube |
| 保偏光纤尾纤 — 模场直径 Ømf [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | min:9.5 µm；max:11.5 µm |
| 保偏光纤尾纤 — 偏振消光比 ER [特性：除非另有说明，Rth=10kΩ、Tamb=25°C、Po=标称值 / 电场沿慢轴] | min:18 dB；typical:20 dB |
| 保偏光纤尾纤 — 尾纤长度 [特性（除非另有说明）：Rth=10kΩ,Tamb=25°C,Po=标称值] | min:1 m |
| 可靠性 — 长期波长漂移（中位寿命） MLλ [特性：除非另有说明，Rth=10kΩ、Tamb=25°C、Po=标称值 / EOL：Δλ=0.2nm；ML=中位寿命、EOL=寿命终点；注1：Telcordia GR-468-CORE/MIL-STD-883试验，不是Products寿命保修承诺] | typical:300 years |
Applications
Key Features
Datasheet
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Supplier Information
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