20GHz帶寬光發(fā)射機(jī)模塊 The LT-20-M is a 20 GHz bandwidth lightwave transmitter module designed for RF over fiber, antenna remoting and broadbａnd RF transmission applications using single mode optical fiber. This module uses a low noise, narrow linewidth, 1550nm distributed feedback (DFB) laser diode as Continuous Wave (CW) light source. A broadbａnd Lithium Niobate (LiNbO3) optical modulator is employed to provide the linear modulation capability that exceeds 20 GHz in its modulation bandwidth. This externally modulated transmitter design provides a high spur-free dynamic range and high input intercept point performances. The LT-20-M can also be used for digital transmission when driven by a widebａnd modulator driver. The DFB laser’s temperature stability is controlled with the use of an internal TEC. The optical modulator is controlled via a high precision bias controller to ensure the operation is set to quadrature. This design enables LT-20-M to provide with the lowest distortion and wide modulation bandwidth. The transmitter provides status monitoring through an RS-232 serial port interface. Features: • Useful Bandwidth upto 20 GHz • Low Distortion for Analog Transmission • High Spur-Free Dynamic Range • Low RIN, Narrow Linewidth DFB Laser • Broadbａnd LiNbO3 Modulator • Status Monitoring: RS-232 (standard) • RS-232 interface for status monitoring Applications: • Optical Communication to 20 Gb/s • Widebａnd RF Transmission over Fiber • RF/IF Signal Distribution • Antenna Remoting • Optical Delay Lines • Satellite Communication | Technical Specifications | | Model Number | LT-20-M | | | | | Optical Specifications | | | | | | Laser Wavelength Range | 1550 nm ±10 nm | | | | | Transmission Distance Range | N/A | | | | | Optical Output Power Level | +4 dBm to +8 dBm | | | | | Output Power Stability | N/A | | | | | Laser Launch Power Level | N/A | | | | | Optical Return Loss | 50dB typ/ | | | | | Optical Connectors | SC/APC, FC/APC Optional | | | | | Receiver Input Wavelength Range | N/A | | | | | Optical Input Level Range | N/A | | | | | RF/Link Specifications | N/A | | | | | Input RF Power Level | N/A | | | | | RF Output Level | N/A | | | | | Link Gain | @ 2 GHz; -18 dB , @ 20 GHz -33 dB | | | | | RF Frequency Range | N/A | | | | | Gain Flatness | N/A | | | | | Carrier Interference Noise Ration (CINR) | N/A | | | | | 2nd Harmonics Distortion | -7 0dBc typ. | | | | | 1dB Compression Point | +20 dBm typ. | | | | | Input Impedance | N/A | | | | | Input RF Return Loss | N/A | | | | | RF Connectors | K Connector Female, 50 Ω | | | | | Mechanical Specifications | | | | | | Operation Temperature | -40°C to +70°C | | | | | Storage Temperature | -55°C to +85°C | | | | | Power Supply | +12 V DC, 2 A max. | | | | | Power Consumption | N/A | | | | | Housing Dimensions | 208mm x 108mm x 30mm | | | | | Control/Monitoring | Laser Enable | | | | | Display | N/A | | | | | Alarm | Local: LED: Optional Input Power | | | | | | | | | 會(huì)員1.png)
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