RECEIVER OF OPTICAL DATA TRANSMISSION, ITS RECEPTION METHOD AND ITS RECEPTION PROGRAM

PROBLEM TO BE SOLVED: To provide a reception technique of DC type optical data transmission, which is not affected by the optical pulse width distortion even if the transmission rate is increased, and the accuracy of data transmission of which is not damaged.SOLUTION: A receiver 10 of optical data transmission includes a receiving section 11 for receiving a coded signal transmitted from a transmitting section 20 via an optical cable 22, a counter 12 for counting the coded signals with a receive clock having a period shorter than that of a transmit clock, an initial detector 13a for detecting the polarity of a coded signal 24b after resetting the receive clock, an end stage detector 13b for re-detecting the polarity after first count when the polarity after reset is in a first state, and re-detecting the polarity after second count when the polarity after reset is in a second state, and a determination section 14 for determining the value of received data based on the polarities detected after reset and after count, and a reset section 15 for performing count resetting by detecting reversal of the polarity after count. 【課題】伝送レートを高速化しても光パルス幅歪の影響を受けずにデータ伝送の正確さが損なわれないＤＣ型の光データ伝送の受信技術を提供する。【解決手段】光データ伝送の受信装置１０は、送信部２０から光ケーブル２２を経由して伝送された符号化信号を受信する受信部１１、送信クロックよりも短い周期の受信クロックで符号化信号をカウントするカウンタ１２、受信クロックのリセット後における符号化信号２４ｂの極性を検出する初期検出部１３ａ、リセット後の極性が第１状態である場合は第１カウント後の極性を再検出しリセット後の極性が第２状態である場合は第２カウント後の極性を再検出する末期検出部１３ｂ、リセット後及びカウント後で検出された極性に基づいて受信データの値を判定する判定部１４及びカウント後に極性の反転を検出しカウントリセットするリセット部１５を備える。【選択図】 図１