TC-DML Series 1550nm High Bandwidth Direct Modulation Laser Module

 

The TC-DML Series is a high-performance analog direct modulation laser module designed for high-frequency, long-range RF-over-fiber transmission. Leveraging a high-linearity 1550 nm DFB laser and operating without an internal RF driver amplifier, it offers full transparency for microwave signal transport up to 18 GHz. Integrated with APC (Automatic Power Control) and ATC (Automatic Temperature Control) circuits, the module ensures exceptional signal integrity, thermal stability, and linearity across its entire frequency band.

By eliminating traditional limitations imposed by coaxial cables or waveguides, the TC-DML significantly enhances signal reach, consistency, and system flexibility-making it ideal for microwave antenna remoting, reference signal distribution, delay line systems, and satellite telemetry (TT&C) applications.

 

 

 

• High bandwidth options: 6/10/18GHz
• Excellent RF response flatness
• Wide dynamic range
• Fully transparent working mode, compatible with various signal encoding, communication standards, and network protocols
• Selectable working wavelength: 1550nm or DWDM wavelengths
• Integrated automatic power control (APC) and automatic temperature control (ATC) circuits
• No built-in RF driver amplifier, offering greater application flexibility
• Available in two package sizes: conventional and mini

 

 

• Remote Antenna 
• Long-distance analog optical fiber communication
• TT&C systems and delay lines
• Military 3-band signal systems
• Phased array 

 

 

Parameters		Unit	Minimum value	Typical value	Maximum value	Notes
Optical characteristics
Laser type			DFB
Working wavelength		nm	1530	1550	1570	Optional DWDM
Equivalent noise intensity		dB/Hz			-145
Edge mode suppression ratio		dB	35	45
Light isolation		dB	30
Output optical power		mW	10
Optical echo loss		dB	50
Fiber type			SMF-28E
Fiber optic connectors			FC/APC
RF characteristics
Operating Frequency@-3dB		GHz	0.1		6
			0.1		10
			0.1		18
Input RF range		dBm	-60		20
Input 1dB compression point		dBm		20
In band flatness		dB	-1.5		+1.5
Standing wave ratio					1.5
RF reflection loss		dB	-10
Input impedance		Ω		50
Output impedance		Ω		50
RF connector			SMA-F
Power supply
Power supply	DC	V		5
Power dissipation		W			10	Single power supply operation
Power supply interface			DB-9

 

 

Parameters	Unit	Minimum value	Typical value	Maximum value	Notes
Input RF power	dBm			20
Working voltage	V			13
Working temperature	℃	-40		-85
Storage temperature	℃	-40		+85
Working relative humidity	%	5		95

 

 

TC-DML	XX	XX	X	XX	X
Direct modulation optical emission module	Working wavelength: 15-1550nm XX--DWDM	Modulation bandwidth: 06G---06GHz 10G---10GHz 18G---18GHz	Packaging: M -- Standard module M2- MINI module packaging D - Desktop	Output power: 06---6dBm 10---10dBm	Fiber optic connector: FP---FC/PC FA---FC/APC SP---User Specified

 

 

 

1. True Analog Transparency - No Internal RF Driver
Unlike many traditional direct modulation modules, the TC-DML series is designed without a built-in RF driver amplifier. This ensures complete transparency to input RF signals, giving system designers maximum flexibility to match front-end gain stages as needed.

2. Wideband Modulation up to 18 GHz
Support for selectable bandwidths (6 / 10 / 18 GHz) allows the TC-DML to serve both general-purpose and high-frequency microwave applications - from satellite TT&C to phased array systems.

3. High Output Power with Exceptional Linearity
With output power up to 10 dBm and input 1 dB compression point at 20 dBm, the module maintains high signal fidelity and low distortion across the RF band.

4. Fully Integrated APC & ATC Circuits
Automatic Power Control and Temperature Control circuits ensure stable optical output and spectral performance across time and environment, enhancing long-distance signal reliability.

5. Excellent In-Band Flatness and Low Noise
With ±1.5 dB RF flatness and equivalent noise intensity down to –145 dB/Hz, the TC-DML excels in delivering precise, low-noise analog transmission over fiber.

6. Compact Form Factor and Multiple Package Types
Available in standard, mini, and desktop formats, the module fits a variety of integration scenarios - from benchtop testing to field-deployed RF fiber links.

7. Designed for Harsh Environments
With operating temperature support from –40°C to +85°C and high humidity tolerance, it's a robust solution for mission-critical and outdoor applications.

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