发明名称 |
Optical transmitter appts. for optical fibre communication - has electro-absorption modulator being controlled to absorb APC diode laser light corresponding to voltage from combined pre-voltage and modulation signal circuit |
摘要 |
<p>The transmitter appts. includes a light source (2), an optical electro-absorbtion modulator (4), and an actuating circuit (6). The light source, e.g. a laser diode with automatic power control, has an actuating current directed into it to produce a carrier light corresponding in intensity to the actuating current. The actuating circuit is provided with a pre-voltage circuit (8) and a modulation signal producing circuit (10). The optical modulator receives the carrier light to absorb it in correspondence to a received voltage from the actuating circuit to output an intensity modulated signal. The pre-voltage circuit places an off-set voltage on the optical modulator so that the voltage applied to the optical modulator in a step region produces a stable carrier light. The modulation signal producing circuit receives an input signal to superpose a modulation signal on the offset signal.</p> |
申请公布号 |
DE19654979(B4) |
申请公布日期 |
2006.03.02 |
申请号 |
DE1996154979 |
申请日期 |
1996.01.04 |
申请人 |
FUJITSU LTD., KAWASAKI |
发明人 |
IMAI, KEISUKE;MISAIZU, SETSUO;NODA, MITSUHARA;YAMADA, HIROSHI |
分类号 |
H01S3/10;H04B10/04 |
主分类号 |
H01S3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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