| 25GHz帶寬光發(fā)射機(jī)模塊 The LT-25-M is a 25 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 has a modulation bandwidth of up to 30 GHz. This externally modulated transmitter design provides a high spur-free dynamic range and high input intercept point performances. The LT-25-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 up to 30 GHz • Highly Linear 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 monitoringg Applications: • Optical Communication to 30 Gb/s • Wideband RF Transmission over Fiber • RF/IF Signal Distribution • Antenna Remoting • Optical Delay Lines • Salite Communication | Technical Specifications | | Model Number | LT-25-M | | | | | Optical Specifications | | | | | Laser Wavelength Range | 1550 nm ± 10 nm, ITU wavelength available | | | | | 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 | 50 dB 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 | RF Link Gain @ 2 GHz, -24 dB; RF Link Gain @ 20 GHz, -28 dB; RF Link Gain @ 25 GHz, -31 dB | | | | | RF Frequency Range | N/A | | | | | Gain Flatness | N/A | | | | | Carrier Interference Noise Ration （CINR） | N/A | | | | | 2nd Harmonics Distortion | -70 dBc 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 | 208 mm x 108 mm x 30 mm | | | | | Control/Monitoring | Laser Enable | | | | | Display | N/A | | | | | Alarm | Local: LED: Optional Input Power | | | | | 會員1.png)
