FPD-UV-3000

7Z02506
概要: 

FPD-UV-3000は測定波長範囲193nm~1100nmで、レーザの時間的変化を可視化し測定する高速フォトディテクタです。UV高感度シリコンピンフォトダイオードを採用しており、光信号を電気信号に変換し、オシロスコープやスペクトラムアナライザなどに接続して計測します。FPD-UV-3000の立ち上がり時間は3 nsです。逆バイアス電圧は付属の外部DCアダプタを介して供給されます。

仕様

  • UV-Si
  • 3 nsec
  • 193-1100 nm
  • 2.55 mm
  • <0.10 pW/√Hz
  • 54 L x 34 W x 40 D (mm)
  • 5.11 mm²
  • 890 nm
  • 0.58 A/W
  • 1.5 V/(W/cm²)
  • 24 VDC
  • External
  • >118 MHz
  • <10 nA
  • 15 mW
  • 8-32 & M4
  • BNC
  • M20x1
  • CE, China RoHS
センサのモデル選択には、センサファインダが便利です。
または弊社までお気軽にお問合せください。

FAQ

Do I need to recalibrate my instrument?

Ophir's temporal sensors do not require calibration.

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What kind of measurements can I do with a temporal detector? Why are they important?

With a temporal detector you can measure the rise time, fall time, pulse duration and pulse frequency. Many laser applications use pulsed laser, for example medical lasers, LIDARs, and high power fiber laser for metal processing to name a few. The parameters of the laser pulses are critical for the performance of the application.

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The temporal sensor can provide accurate measurement of temporal parameters. How can I relate those to absolute value of pulse energy?

Pulse energy can be measured directly using one of Ophir's calibrated energy sensors. Another way is to use a calibrated power sensor and calculate the pulse energy using:

Pulse energy [J] = average power [W] / pulse rate [pulses per second]

Temporal sensors provide a signal that is proportional to the instantaneous power output of the laser. When viewing the pulse waveform on an oscilloscope, the integrated area under the curve is proportional to the total pulse energy.

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What is the difference between the calibrated power sensors such as PD300 and the temporal sensors?

calibrated power sensor measures average power of CW and pulse laser beams. The sensor is connected to an Ophir Meter or PC Interface. Power sensors are optimized for low noise and linear response in order to maximize power measurement accuracy. The measured laser beam must be smaller than the sensor's aperture in order to obtain an accurate power measurement. Temporal sensors are optimized for high speed response in order to reproduce pulse temporal characteristics with high fidelity. A temporal sensor is usually smaller than the laser beam size and samples a portion of the beam. The temporal sensor is connected to a scope or spectrum analyzer to display temporal characteristics of pulsed lasers.

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I need to measure the temporal pulse shape of a very powerful laser. How can I do that without damaging the detector?

There are several possible ways to do this:

  • Use a beam sampling optic (partially reflective mirror or uncoated window).
  • Feed the laser beam into an integrating sphere and attach the temporal detector to the sphere using the adapter accessory.
  • Use a beam dump and position the detector such that it picks up some of the reflected laser radiation.

Attenuating accessories are available (see temporal detector's product page). Laser power density on the attenuators should be less than 50 W/cm².

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I don’t see my signal on the oscilloscope or the signal is not as expected. What should I do?

See the troubleshooting section of the user manual in the temporal detector's product page for detailed information.

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サーマルセンサでレーザパワーを測定しながら、オシロスコープでレーザの波形を測るにはどうしたらよいですか?

目的によって複数の選択肢があります。

  • ディスプレイの内部演算処理による遅れ時間が問題にならない多くの場合、最も簡単な解決策はパワーメータのアナログ出力を利用することです。実際の読み値に比例する電圧信号(指示値をデジタル-アナログ変換してアナログ量に還元)を利用しますので、校正された読み値として出力されます。フルスケールの値は、接続しているパワーメータディスプレイと使用しているパワーレンジの関係により自動的に決定されます。
  • オプションのSH-BNC変換コネクタ(製品番号P/N 7Z11010)を使用すれば、センサからの無加工の電気量をオシロスコープで波形観測できます。センサのコネクタ部分に組み込まれているEEROMには校正データの情報が記憶されており、オフィールのディスプレイやインターフェイスユニットではそれを基にして電気的に増幅し指示値に変換しているので、校正係数に全く依存しない純粋なアナログセンサとして単独動作させるためにSH-BNC変換コネクタを使用します。 注意点としては、レーザ出力がセンサの最大許容パワーに対して低すぎるとオシロスコープのノイズレベル程度の小さな信号にしかならず、この方法は入射光量に比例した信号としては取り出せないので必ずしも適切ではありません。
  • 最低限の要求仕様を満たしていれば、FPS-1高速フォトディテクタをオシロスコープに接続してレーザのパルス波形そのものを実時間計測できます。ディテクタに反射光などの微弱光の一部を入射させ、光の強度の時間的変化を簡単にオシロスコープで波形確認することが可能です。
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Calibration

Ophir's temporal sensors do not require calibration.

図面

アクセサリ

上記のセンサに対応するアクセサリを各種ご用意しています。
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  • SC Fiber Adapter

    SC Fiber Adapter

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    SMA Fiber Adapter

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    This fiber adapter is used for connecting power and energy sensors to a standard SMA-type fiber. Many sensors need an additional mounting bracket to connect to all fiber adapters. More information can be found in the datasheet below.