JPWO2019160696A5 - - Google Patents

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JPWO2019160696A5
JPWO2019160696A5 JP2020543296A JP2020543296A JPWO2019160696A5 JP WO2019160696 A5 JPWO2019160696 A5 JP WO2019160696A5 JP 2020543296 A JP2020543296 A JP 2020543296A JP 2020543296 A JP2020543296 A JP 2020543296A JP WO2019160696 A5 JPWO2019160696 A5 JP WO2019160696A5
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apd
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optical signal
return optical
apds
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Priority claimed from US15/898,132 external-priority patent/US10775486B2/en
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第1バイアス信号によってアクティブ化されたときに多戻り光信号を受信および検出するように動作可能な一次アバランシェフォトダイオード(APD)であって、前記多戻り光信号は2つ以上の光パルスを含む、一次APDと、
第2バイアス信号によってアクティブ化されたときに前記多戻り光信号を受信および検出するように動作可能な二次APDと、
前記第1バイアス信号に遅延を追加することによって前記第2バイアス信号を生成する遅延回路と、
前記多戻り光信号の検出に基づいて前記一次APDによって生成された第1出力と、前記多戻り光信号の検出に基づいて前記二次APDによって生成された第2出力を組み合わせるように動作可能なコンバイナと、
を備え、前記多戻り光信号の第1パルスを検出するときに前記一次APDが飽和すると、前記二次APDが前記第1パルスの後続の前記多戻り光信号の第2パルスをデコードする、システム。
A primary avalanche photodiode (APD) capable of receiving and detecting a multi-return optical signal when activated by a first bias signal, said multi-return optical signal containing two or more optical pulses. , Primary APD,
A secondary APD capable of operating to receive and detect the multi-return optical signal when activated by a second bias signal.
A delay circuit that generates the second bias signal by adding a delay to the first bias signal, and
It is possible to operate to combine the first output generated by the primary APD based on the detection of the multiple return optical signal and the second output generated by the secondary APD based on the detection of the multiple return optical signal. With a combiner,
When the primary APD is saturated when the first pulse of the multi-return optical signal is detected, the secondary APD decodes the second pulse of the multi-return optical signal following the first pulse. ..
前記遅延回路を制御するように動作可能な距離ゲートコントロールをさらに備える、請求項1に記載のシステム。 The system of claim 1, further comprising a distance gate control that can operate to control the delay circuit. 前記二次APDが前記一次APDに対して減衰される、請求項1に記載のシステム。 The system of claim 1, wherein the secondary APD is attenuated relative to the primary APD. 前記二次APDが前記一次APDとは異なる光学面上に配置されて、前記二次APDが前記一次APDよりも光強度の低い前記多戻り光信号を受信するように構成されている、請求項3に記載のシステム。 Claimed, the secondary APD is arranged on an optical surface different from the primary APD so that the secondary APD receives the multi-return optical signal having a light intensity lower than that of the primary APD. The system according to 3. 電流増幅器をさらに備え、前記二次APDの前記第2出力が、出力電流を含み、前記電流増幅器が、前記二次APDの前記出力電力を増幅するように動作可能である、請求項1に記載のシステム。 The first aspect of claim 1, further comprising a current amplifier, wherein the second output of the secondary APD comprises an output current and the current amplifier can operate to amplify the output power of the secondary APD. System. ゲインコントローラをさらに備え、前記一次APDの前記第1出力が出力電流を含み、前記ゲインコントローラが、前記一次APDの前記出力電流および前記二次APDの前記出力電流に基づいて反転ゲイン比コントロールを介して前記電流増幅器を制御するように動作可能である、請求項5に記載のシステム。 Further comprising a gain controller, the first output of the primary APD comprises an output current, the gain controller via an inverting gain ratio control based on the output current of the primary APD and the output current of the secondary APD. 5. The system of claim 5, which is capable of operating to control the current amplifier. 前記コンバイナの出力に結合され、検出された多戻り信号を生成するように動作可能なダイバーシティ強化型光検出器をさらに備える、請求項1に記載のシステム。 The system of claim 1, further comprising a diversity-enhanced photodetector coupled to the output of the combiner and capable of operating to generate a detected multi-return signal. 2つ以上の一次APDを備え、前記二次APDは、前記2つ以上の一次APDの発射コントロールシーケンスに基づいて前記2つ以上の一次APDに冗長なサポートを提供する、請求項1に記載のシステム。 1. system. 2つ以上の一次APDおよび2つ以上の二次APDを備える、請求項1に記載のシステム。 The system of claim 1, comprising two or more primary APDs and two or more secondary APDs. 前記多戻り光信号を検出するように、前記2つ以上の一次APDのうちの1つ、および前記2つ以上の二次APDのうちの1つを選択するように動作可能であるコントローラをさらに備える、請求項9に記載のシステム。 Further a controller capable of operating to select one of the two or more primary APDs and one of the two or more secondary APDs to detect the multiple return optical signal. The system according to claim 9. 前記コンバイナは、最大ゲイン比結合を用いてMIMO処理を実行する、請求項1に記載のシステム。 The system of claim 1, wherein the combiner performs MIMO processing using maximum gain ratio coupling. 一次APDで多戻り光信号を受信するステップであって、前記多戻り光信号は、前記一次APDを飽和させ、検出盲点を生成させる一連のパルスを含む、ステップと、
二次APDで多戻り光信号を受信するステップであって、前記二次APDは前記一次APDに対して重複して動作する、ステップと、
前記二次APDによって、前記一次APDの検出盲点に隠された前記多戻り光信号のパルスを検出するステップと、
を含む、方法。
A step of receiving a multi-return optical signal in a primary APD, wherein the multi-return optical signal comprises a series of pulses that saturate the primary APD and generate a detection blind spot.
A step of receiving a multiple return optical signal in the secondary APD, wherein the secondary APD operates in an overlapping manner with respect to the primary APD.
The step of detecting the pulse of the multiple return optical signal hidden in the detection blind spot of the primary APD by the secondary APD, and the step of detecting the pulse.
Including the method.
前記二次APDと前記一次APDとの間に光分離が存在し、前記第二APDで受信した前記多戻り光信号の光強度は、前記一次APDで受信した前記多戻り光信号の光強度よりも減衰されている、 請求項12に記載の方法。 There is optical separation between the secondary APD and the primary APD, and the optical intensity of the multi-return optical signal received by the secondary APD is higher than the optical intensity of the multi-return optical signal received by the primary APD. The method of claim 12, also attenuated. 前記一次APDが前記多戻り光信号によって飽和される場合、前記二次APDは、前記二次APDで受信した前記多戻り光信号の光強度の減衰に起因して飽和を回避する、請求項13に記載の方法。 13. When the primary APD is saturated by the multi-return optical signal, the secondary APD avoids saturation due to attenuation of the light intensity of the multi-return optical signal received by the secondary APD, claim 13. The method described in. 前記一次APDにおける前記多戻り光信号の検出が第1バイアス信号によってアクティブ化され、前記二次APDにおける前記多戻り光信号の検出が第2バイアス信号によってアクティブ化され、前記第2バイアス信号は、遅延ステップによって前記第1バイアス信号に対して遅延される、請求項12に記載の方法。 The detection of the multi-return optical signal in the primary APD is activated by the first bias signal, the detection of the multi-return optical signal in the secondary APD is activated by the second bias signal, and the second bias signal is 12. The method of claim 12, wherein the delay step delays the first bias signal. 前記遅延ステップは、前記多戻り光信号のパルス幅の一部である、請求項15に記載の方法。 15. The method of claim 15, wherein the delay step is part of the pulse width of the multi-return optical signal. 2つ以上の一次アバランシェフォトダイオード(APD)であって、それぞれが第1バイアス信号によってアクティブ化されたときに多戻り光信号を検出するように動作可能であり、前記多戻り光信号は2つ以上のパルスを含む、2つ以上の一次APDと、
2つ以上の二次APDであって、それぞれ第2バイアス信号によってアクティブ化されたときに前記多戻り光信号を検出するように動作可能であり、前記2つ以上の二次APDのそれぞれは、前記2つ以上の一次APDのそれぞれと重複して動作して、前記多戻り光信号を検出するように動作可能である、2つ以上の二次APDと、
多戻り光信号の検出のために、前記2つ以上の二次APDのうちの1つおよび前記2つ以上の一次APDのうちの1つを選択するように動作可能なコントローラと、
を備えるシステム。
Two or more primary avalanche photodiodes (APDs), each capable of operating to detect a multi-return optical signal when activated by a first bias signal, the two multi-return optical signals. Two or more primary APDs, including the above pulses,
Two or more secondary APDs, each capable of operating to detect the multiple return light signal when activated by a second bias signal, each of the two or more secondary APDs. Two or more secondary APDs that can operate in an overlapping manner with each of the two or more primary APDs to detect the multiple return optical signal.
A controller capable of operating to select one of the two or more secondary APDs and one of the two or more primary APDs for the detection of multiple return optical signals.
A system equipped with.
一次および二次APDの選択の基礎が予め定義されている、請求項17に記載のシステム。 17. The system of claim 17, wherein the basis for selection of primary and secondary APDs is predefined. 一次および二次APDは、前記多戻り光信号の信号処理情報に基づいて動的に選択される、請求項17に記載のシステム。 17. The system of claim 17, wherein the primary and secondary APDs are dynamically selected based on the signal processing information of the multi-return optical signal. 前記動的選択は、前記一次APDの発射順序を変更する、請求項19に記載のシステム。 19. The system of claim 19, wherein the dynamic selection modifies the firing order of the primary APD. 前記動的選択が、前記第1バイアス信号に対して前記第2バイアス信号を調整する、請求項19に記載のシステム。 19. The system of claim 19, wherein the dynamic selection adjusts the second bias signal relative to the first bias signal. 前記動的選択は、前記一次および二次APDの焦点面上のそれぞれの位置に基づく、請求項19に記載のシステム。 19. The system of claim 19, wherein the dynamic selection is based on their respective positions on the focal planes of the primary and secondary APDs. 選択された二次APDが、選択された一次APDの主光学焦点面から離れて配置されて、前記選択された一次APDに対して前記選択された二次APDを減衰させる、請求項17に記載のシステム。 17. Claim 17, wherein the selected secondary APD is placed away from the principal optical focal plane of the selected primary APD to attenuate the selected secondary APD relative to the selected primary APD. System.
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