发明名称 |
FSK LASER TRANSMITTING APPARATUS |
摘要 |
In an FSK laser transmitting apparatus, a light source can change the output light frequency. A driver performs FSK of the light source with a plurality of values. A beam splitter splits the output light from the light source into two split beams. A delay circuit delays one of the two split beams with respect to the other. A beam coupler combines delayed and nondelayed beams as the two split beams from the beam splitter. A controller detects the beat frequency of combined light from the beam coupler and supplies a control signal to the driver so as to set the beat frequency to be a predetermined value. |
申请公布号 |
GB2168561(A) |
申请公布日期 |
1986.06.18 |
申请号 |
GB19850029757 |
申请日期 |
1985.12.03 |
申请人 |
* NEC CORPORATION |
发明人 |
MINORU * SHIKADA;SHUNTARO * YAMAZAKI;SADAO * FUJITA |
分类号 |
H04B10/61;H01S5/042;H04B10/00;H04B10/07;H04B10/25;H04B10/516;H04B10/524;H04B10/556;H04B10/572;H04L27/12 |
主分类号 |
H04B10/61 |
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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